High dex top+bottom

Considering my future NL's gear, looks like on my list of things to get is a 30-32 dex top+bottom.

~ price/equips I'm using
3 dex pants - essentially free (costs what, 1mil to forge)
5 dex top - ditto, as they are green/brown or something
2 dex 70% bottom = 5m
3 dex 30% bottom = 5m (didn't use these, but I could)
3 dex crystal = 15m
5 dex crystal = 150m
1 hammer = 40m

I'm trying to figure out what the cheapest way to get this set would be.
ex.
10 dex top (5 clean + 5 from dex crystal) = 150mil
22 dex bottom (3 clean + 5 from dex crystal + 14 from scrolling) = 2 billion
total=2.1 billion

12 dex top (5 clean + 5 from dex crystal + 2-3 from dark crystal) = 170mil * (odds of getting +2 or better with a mid grade dark) -> eg. 0.2 = 850m
20 dex bottom (3 clean + 3 from dex crystal + 14 from scrolling) = 370m
total=1.2 billion (?)

10 dex top = 150mil
22 dex bottom (3 clean + 3 from dex crystal + 16-18 from 9 slots) = 480mil
total=630 million

The extra hammer slots obviously help if I'm going all 70%s, but is there any cheaper way to do this? >_> Maybe something like 2x30% on 6 dex pants, then 5 70%.

And are 60%/100% bottom dex any more available? I never saw a 60%, and 100%s were near 40m last I played.