I played one Gold match as HA against collectors and another 3 as HS against the other 3 factions.
I came on Wave 2 in that first match and I spent the first 2 waves dying. Then it got better and I ended up in 2nd in the score list, although the last guy was a Jugg which really helped tanking bosses and not dying, so yeah, score doesn't mean much.
The issue with the HA was that if, say, a Collector Captain appeared and I wasn't aware of him, I'd die very very quickly. I spent most of the time with 1health bar. I started dying less from Wave 5 on, but it was a real challenge to stay alive.
Now with the HS, I played with MaxCrushmore and his friends, and although I could notice a huge difference in survivability (I barely fell much), I always scored last with almost half the points of the 3rd place.
Another factor to take into consideration for not falling that much is that I still don't know the spawn points and hence I follow people around, so sometimes I get late into the fight and due to that I might be dying less.
But still, Tech Armor helps a great deal and Throw is nice against unprotected mooks.
I can see that it's really a matter of choosing between offense and defense. The HS is not bad on offense, but he's quite worse than the HA.
I will give more tries to the HA and see if I can manage to improve survivability skills. Although not sure how to do that as the main defensive stuff are rolling and cover. And RHA (mainly for powers in this case). I already know how to roll well, maybe I can improve cover.
Thanks for your insights 