I've said this before, but if you're playing for the bonus only, and they give it to you up front, then be very aggressive at first. Shoot the moon, or go bust trying. If you make it to the moon, then grind through the play requirement at whatever allowed game has the lowest house edge.
Just be careful here because a lot of online casinos have now imposed restrictions on how much you can bet with an up front bonus. For example, some casinos have clauses where they can void your bonus if you bet more than, say, 20% of your balance on any one hand or spin.
I've also seen some very nasty bonuses that limit your withdrawal to 20X your deposit+bonus amount, the excess becoming void.
Some terms and conditions state that wagers on prohibited games, like video poker, for example, don't count towards wagering requirements. Others state that what ever winnings you earned from playing video poker will be removed from your account (they won't reverse your losses, of course). And some others will completely void everything if you play even just one hand a video poker, refunding only your deposit when you ask to withdraw.
Basically, playing with bonuses is playing with fire these days. The problem is you can't get an edge online without bonus hustling. I remember I use to get periodic match bonuses from a certain decent online casino. I used them a couple of times - fairly and all within the their rules, won a bit and withdrew on a few occasions and surprise surprise, I am bonus banned. So I have basically just given up on online casinos.