Max-Hit/Recovery Recommendation for Pinnacle Bosses (Normal-Not Uber)

Hi all,

Context:

I'm playing as an aurabot-witch on standard, (levelling with a couple of friends and gf through campaign).

I'm playing pseudo-hardcore as well (on softcore league, to play with my friends who don't give a crap if they die or not, but I'm trying as a personal goal to make it more fun.)

So I want to be as tanky (safe) as hell. I don't think i'll try uber bosses, but maybe the normal versions of the pinnacle bosses as an end goal.

What range of max-hit/recovery I should be aiming for, where even an idiot could probably survive the normal pinnacle bosses?

Also any suggestions of gear/build combinations are welcome. :D