rank 45 on mod 1 and so far so good. I use mod minimally tho:
Rewards x2 - almost always on.
Never used "Draw all-league cards"
Never used Battle speed
ViP 4 is risky (in my opinion) so I dont use it anymore. - without it gem mine wont work (unless you purchased VIP with $$)
Damage x2 only on 1-2 toons to get out of tough spots (and never in PvP). In Gold mine I use it more but at some point you dont even need that much gold anymore. Divine Arena - if you mess with the health, game can crash. The Pit - game will crash 70% if you start with health x2
Evo "discount" sometimes.
Its like with every "advantage" if you put it on "cruise control" you only end up screwing yourself... Be smart not greedy... Thats just my 2 cents