During the 5s , you don't need 30 reps. 20 will do for most loads. Tot, O&G, Bryan, et al had a thread about this topic a while back.
At your 5rm, the last workout would probably look like:
5, 4, 3, 3, 2, 2 unless you want to rest 10 minutes plus per set. 30 to 40 reps was for 70 to 75% 1RM...