What region/timezone are you in?
I’m a UK console player. I tend to routinely play Horde with a group of friends starting from around 21:00-22:00 through to midnight UK time most evenings but am usually playing Escape before then - usually between 19:00-21:00. Depending on times, I’m happy to help out.
Yes, I ran through act 2 with score cards.
Also our clayton got as many cog tags as he could - even in the 2nd act.
But still if not killing the warden and many scions was detrimental to my score then those things were sufficient to make up for it.
I’ve heard some rumours about some sort of glitch on this Hive which increases the score. I don’t know the details, but someone told me that it involves the COG tags. I don’t know anymore than that.
Headshots can make a big difference to score, especially the bigger enemies like DR1s. Trouble is, they self-destruct after so much damage and I’m told when they do this it only gives you a partial set of points. And when the Juvies cause chain reaction deaths, that also costs you apparently. I’ve done this Hive many times and sometimes there can be a fairly big difference in score despite running the same characters and cards. I’ve played with some very good Fahz’s who can rake up very decent scores even by the saferoom because of the number of headshot kills. I’m told that score-wise, you really need the DR1 spawn in the first act to get the best scores as there are lots of DR1s, wheres the explosives spawn doesn’t have as many high-value targets.
Did you hear about the tag glitch from a reliable source?
I can imagine somebody jumping to an inaccurate conclusion about points going up higher when he didn’t know a team mate had a score card and that team mate picked them for greater effect than when he did previously.
It was just from a friend. she heard it from someone else. It’s just unsubstantiated rumours at this point and may have no substance in it whatsoever. I mean, I’ve seen half-time scores (at the supply room stage) of -02:00:00, so I don’t think the highest scores (upwards of -04:00:00) are that outlandish.
It might well be that due to the extreme number of enemies spawned on the hive, people are getting much higher times than they’re used to. Would be my guess anyway. My team got a time around -1:20:00 with no Score Boosts because only Cole survived for the end on Master, with maybe 1 COG tag getting missed because our Fahz player was being stupid and ignoring COG tags because of doing too many Clock runs🙄(if this sounds harsh, there really is no better way of putting it). He was the only one to go into the first supply room at the beginning so I wasn’t there to check.
Fighting all of the monsters also hurts your score when you lose points for everybody who dies. Every time that we made it fighting it was only cole getting on that helicopter.
Heads up if you want a better score, make sure you get the right spawn. Ice Scions and Salvo Scion give you the most score out of all the Scions or DR-1s. 
Individually, yes, Salvo Scions and DR1 Devastators (and Ice Scions) are worth more points than other Scions and DR1s, but the DR1 spawn is overall better because you get more of them. For example in the very first section if you get the Frag Popper spawn, you get Grenadiers and Drones (and no large enemies); whereas for the Shock Popper spawn you get lots of DR1 Protectors. For the second fight, you only get 4 Salvo Scions (if my memory serves me correct), whereas the other spawn gives you more than 4 DR1 Oppressors. In total once you add it all up, you get more possible points with the DR1/Shock Popper spawn.
Every run we tried with DR1s gave less score even though there more of them. Salvos gave higher score even though there were less of them it was very noticeable in the first section. (Still working on it) there was a difference of nearly 15 min on an occasion between the spawns.(With all tags collected in the 1st section)
The second section is a nightmare. Still working on it, very slowly.
My strategy was to play on inconceivable and kill all enemies in the hive with ironman off, and then once I’d beaten it that way, (I believe my teams score was -1:15:00) I went back in and mastered it by just running through the second half, where the final score was only -0:43:00. This is the best way I’ve found for anyone struggling and wanting a good leaderboard time.
Any chance of FIXING the cog tag glitch TC?
Turns out my friend was correct about this COG tag glitch! 
My strategy, which worked well and got me a score in the region of -01:57:00 (I can’t remember the precise time off the top of my head), was to play the 1st section as normal, try to maximise high score kills (executions, active headshots etc), use score cards, and grab as many normal weapons, grenades and ammo as possible. In the 2nd section, run through it and when you get to the helipad just fight from there. When you get to about half ammo (or whatever point you feel comfortable) pull the switch to close the door and continue fighting while the door closes. This allowed us to use the run method and maximise kills. The disadvantage is that you can’t really carry heavy weapons with you - it may be possible but will slow you down and be hard, and for characters with venom-based cards (Keegan mostly) won’t be able to use them as you’ll obviously be very far ahead of the venom - Keegan’s Ammo Resupply won’t replenish explosive ammo.
My friends and I favoured Fahz (who obviously used the Longshot and EMBAR); Clayton (who used the Torque coupled with Serrated Edge; and a Lancer); and Kait (who grabbed a Gnasher and depending on enemy spawns, can also get an Overkill as well). It’s also worth getting someone to carry an extra Longshot for Fahz too - the Lancer isn’t necessary for Clayton, but if you choose to run a different character then it might be a different story.
Also for the 2nd section, Fahz would lead the way - we found that there’s a small window for Fahz to slow down, stop and get some headshots on the Elite Drones along the way. During this time your team mates can run to both supply rooms and grab the COG tags and catch up. The timer on the enemy spawns means that you probably have around 10-15 seconds to do these little bits before the reinforcement spawns (DR1s, Scions, Poppers etc) start to catch up with you. You can further slow them by planting a grenade or two in the green stairway section inbetween the two fights.
Considering I only got 2% rather than 1%, I may just have to try this strategy. Thing is I’ll have to get some folks with mics together, as I’m typically a solo player. Lol
I’m not totally sure where top 1% starts, but I believe it’s in the region of around -01:30:00, or maybe a little bit higher.
One of my earlier scores was -01:27:57 and that was top 2%. A friend of mine had -01:39.57 and they were in top 1%, just so you know what to aim for!
That’s what I’ll aim for then. I’ve got a guy I play a decent amount of horde with. I’ll have to see if his horde skills translate to escape lol.
Thanks for the info!
And in regards to that cog tag glitch, by the way, that’s complete and utter ■■■■■■■■. Anyone doing that deserves a nice solid suspension, or their leaderboard results wiped at the very least. I couldn’t imagine cheating in a PvE mode.
In my opinion The Onslsught would be hardest without running through chapter 2. But yes, The Split is definitely a though one too. I got lucky running through there as Cole lol. I’ve helped a few friends in the meantime and it can definitely be tricky.
Recommended is to use right path in first act and left path in second act. I don’t want to spoil anything but it probably makes sense once people play it. 
I’ll play with you if you want. I’m not good enough to solo with Cole but I’m not horrible either.
I’d be up for that. My gamer tag is the same as here. Add me and I’ll talk to you when I get a chance about when we can play.