Thread necromancing ftw!
I confess. I vent my cards occasionally at our local board game society meetings. I have tried cockatrice but I prefer slamming real cards on the table. It would be fun to have a virtual mtg match in altis life with someone. Like goldfishing with your real deck but with...
Since you have i7 try opening the Arma3 launcher, go to settings and enable hyper threading. From there you can also manually set Arma to use all your cores. It's on auto mode in default but it seemed to improve my fps a bit. Atleast it's feels more stable.
Do you play with 1080p resolution...