i started a west side form of deads, where you take 85 - 90% of your max, (after two good warmup sets of course) do a rep, wait 30 - 45 sec. do another, and another until you hit 6 or 8. then drop down to 60% and do a straight set of 8. i was only repping 335 for 6 - 7 when i started. now i can pull 405 for 6. it works. deads you want to pull as much as possible, safely. i would say 5 sets of 12 with 225 is a wast of time personally. its a power movement. stay lower in your rep range hit high rep stuff later in your workout.
MJ