want help fine tuning my build.

at SL 116 my character will have
40 vit
16 str
30 end
40 dex
40 faith
+10 elite knight chest
+5 black iron gauntlets/greaves
MoM
DWGR, RoFaP
Using a +15 iaito and +5 lightning richards rapier.
I was wondering wether to put the points in vit for health, faith for dmb, str for the washing pole, or end to wear a heavier chest or replace the rapier with a proper spear. Thoughts?

Washing Pole is great if you like weapons such as the Iaito. I'd say Str.

focus on a faster weapon to buff such as iaito or BSS, as the heavier washing pole swings slower, and buffs are more useful on faster weapons.

put rest into End, you'll probably need it for more flipping around/combos/blocking etc, let alone allowing you to wear more equipment.