i do this with booster and everytime in play for about 8-9 minutes and i get 2.3 k exp if i lose and about 2.8 k exp if i win.
but i dont get rewards (but already got them). i only get rewards when i play with 4
my favorite method to farm is with privat opk hack so you can kill 1k ai's and come back to suicide and get the exp ( very good with mouserecorder) you can lvl up very fast