I have to say, I bought Doom x5 and I had the opposite experience you had, I have dies WAY more than any other toon so far getting to lvl 10. maybe it gets a lot better, but I find that the cooldown on your summons is only 15/30 seconds, so unless you split them 1/2 and 1/2 on different characters, i find that the fights with bosses last a lot longer than 15 seconds, and I am often left with no DPS or defense and die a lot... maybe it gets better?