strange... when you reach act 2 you already have 40-42 main stat (if you'll decide to kiss)
then you'll level up wits and con\mem(as needed) making you almost always 1st in combat while also rising your crit chance significantly. during the mid-end of act 2 you can easily reach 50+% crit chance...
and your skills will also be nearly maxed making everything easier then 4 party (especially if you'll utilize invis and skills like deflective barrier. also you can abuse init by having your 2nd character join the fight later in the round.
the only downside is that your CC will be a bit more limited, but you can compensate with skills like skin graft or consumable items.

also 30% increased hp was never a good thing. if you're out of armor - you're CC'd to death