my lvl 84 Sin.
ok here's my current load out:

Vamp (15ias)
Bramble (lvl 20 thorns 37%+ psn dam)
Trangs gloves
Gore riders
Fury (wrist sword, ya i know trying to get a suwayaah)
Chaos ( wrist sword, " " " " " " " " ")
Raven frost
Carrion wind
Highlords

Switch:
2x +3 shadow disciplines claws

asn torch (17 all attributes, 10 all res)
3x Shadow Gc's one with 7% Faster R/W

WW damage: 6.5k
AR: 3.7k :( ( my main problem)

after charms and torch
STR: 138
DEX: 148 (ish)
VIT: 268
ENE: 50

i think my biggest problem is lack of AR, what can i do to bring it up? i mean is it worth losing highlords and a ring for angelic bonus? can you guys help me out?

i am also not that wealthy so cant really get my hands on stuff like enigma, hoto, so... some realistic suggestions. Also i see shako being another popular wwsin helm, should i switch to that? but then i will have no mana leech, and i am already having trouble with mana, i only have like 260 so after a few WW's its gone quickly.

EDIT:

here's my skills,
Claw mastery : MAXED
Venom: MAXED
Weapon Block: MAXED
Fade: MAXED
Dagon flight: 1-3
Shadow Master: 6

i dont have any points in PB or WoF... should i remake my sin to include these? thanks.

What's this assassin for? PvP PvM? If its for pvp, I think maybe you should chuck out the highlords and the carrion wind ring for the angelic combination. If you're still having ar problems you might either consider switching your non-chaos claw to a bartucs with an AR jewel in it or tossing the ravenfrost for angelic and bering your helm. Btw, if it is for pvp, leeches dont matter, they hardly work at all.

Pvm, I think the above suggestions are pretty good, also if venom adds < 1k dmg I think you might wanna use burst of speed instead, IAS is really really nice to have.

PvP: Put a point or two into mind blast, it helps out tons.