I've read a lot and friend blaster pro seems to be the best application to send a massive amounts of friend requests but are there any "stealth" tactics when mass friending-ing people I should know about to avoid my account being terminated?
Randomize what demographic you are adding friends from. If you are only adding females age 18-19, this can be a telltale sign of a bot, and result in a quick ban.
I'm not certain if this sort of method works much. I've been a myspace member for ages and the thing that annoys me most is the amount of people who send friend requests and guess what i ignore 100% of the friend invites from bots.
Check your few friends on their network before you invite them or match your interest, also read the TOS of myspace for adding friends and comply them.