Onslaught is scary. What should my first build be?

So since there are some challenges you can only complete on Onslaught, I'm dipping my toes into the water of Hardcore.

Pick my build for me! I'll play the most suggested build that this thread decides on within 2 hours or 3 pages. Except Spork. There shall be no sporking.

Mmh, that´s a NEW CHALLENGE

Maybe an archer without RoA?
It will often shoot up your heartbeat ;)

Ended up making a Summoner Witch. Going Freezing Pulse+2x Bear Traps until Merciless ledge.

I didn't want a challenging build, lol. Just playing on onslaught is difficult enough.

Leap slam witch.