Merc AR calculations

I was wondering how exactly does infinity affect merc's chance to hit, but I couldnt find AR formulas for mercs. If someone possesses such a knowledge please let me know . I'd also appreciate someone to tell how much AR does act 2 nm merc have on lvl91 and with +2 skills (approx).

Thanks in advance!|||Acording to the 1.10 Mercenary Stats topic pinned at the top of the Amazon Basin's Technical Discussion forum, a level 91 Desert Mercenary hired in Nightmare would have 2,524 base Attack Rating and choose level 23 Jab ~85% (168/(168+30)) of the time when attacking. Level 25 (23+2) Jab applies +226% AR (and +57% Damage), resulting in minimum 8,480 AR.|||The Conviction part of it is simple - it will decrease their defense by 83%. There are a few exceptions but they're hardly worth mentioning.