How does Marcus living legend interact with dug in and explosive resistance

So I realize marcus is supposed to be a tank in horde mode taking the damage so others can get free shots in time for time or for him to produce cover fire. I also undesrstand that taking damage recharges his ultimate slightly quicker. But my main question is if I use the skill card dug in and explsoive resistance which reduces daamge taken does that slow down my build up for living legend? If so seems kinda like building him as tank is kinda counter productive