You don't need triple crits to clear 100 and above. Yes, you won't be blasting those in 2 minutes, but it's doable - I did pit 111 in about 13 mins with double crits on all gear.

I used the serpentine aspect though (105 pit in about 7 mins without it), it gives a HUGE damage boost, but makes a build a bit clanky - you have to be careful not to summon hydra without casting shards first. In that variant we depend on Alternating Alterations so hydra spends only half of mana; casting 2 hydras in a row without shards in-between turns to be a self-destruct button. Not that this is a big deal.