Which rune should I level first to 12 for banish form?

[Herby]

You start doing crits in banish when you get 141 crit.. And yes vengence and advantage are both good options for lance....

But i recommend a lvl 12 to hit on a stunner insteed, if you dont already have that. :-)
Since banish is all about the stuns.. :-)

while on the topic, is it easier to crit on bigger baals/cerbs than smaller?
as in, does the wb resilience change with hp?
because i have 143 crit on a hero, but never seen it crit on 250m boss

141 is the limit.. crits dont happen very often, so unless you watch hole fight every time and dont refresh you might not see it..

Tomas, i think you weren't updated when the new banish bosses got upgraded? or you're only talking about lancelot.

141 crit is only applicable on lance, because his skill increases his crit.

180-190 crit is the minimum for all other heroes to crit the boss.