Will this be enough for DEXless?

You would have 82 accuracy with a Sniper Pill and the DEX cape at level 50, which should be all right. You wouldn't be the best CPQ character, though, because avoid up is a huge problem with less than about 120 accuracy.

wierd, that's what i got to (at 50):

dana: 7 acc
mask: 15 acc 1 dex (22 acc 1 dex total)
bottom: 5 acc 15 dex (27 acc 16 dex total)
shoes: 9 acc 2 dex (36 acc 18 dex total)
cape: 9 dex (36 acc 27 dex total)
sword: 3 dex (36 acc 30 dex total)

if i'm right, for warriors 1 dex=0.8 acc, so:
30*0.8=24
24+36=60
ADD TO THAT: 15 acc from blessing, 10 acc from pill and 20 acc from max mastery (you wanna go DEXless and not max mastery before 50? :f6

you'll get to:
105 acc @ 50 with a sniper pill, dex cape and max mastery.

EDIT: forgot to add 4 dex base, 108 acc total.
EDIT#2: @120, with 8 dex earrings and 10 dex 10 acc Zhelm, and without the 3 dex sword, acc=123, correct me if i'm wrong

What would you recommend for a future perma-50 Soul Master/Dawn Warrior?

I'm planning to have as little Dex as possible. I'm planning to have a Maple Soul Singer, and probably a Dex cape.

I'll have level 9 Blessing.

you'll be fine with even a 20 dex overall (that should have some acc on it), a ZHelm, a decent soul singer and an attack shield. some 8~10 acc shoes would add alot. also, try to get a dep star and at least a 6 dex cape. if you can get a mask, that would be awsome. (if you want to hit stuff even with avoid up, you'll need a good mask, shoes and maybe a better overall.)