Hit-N-Run Sin

This build i thought up of is already made already by some other people i think, but i'll tell u the skill set anyhow. I use this build for RA just to kill noobs 4 fun

13+2+1=16 dagger mastery
12+3=15 critical strikes.

Skills
Aura of Displacement [E]
Mark of Instability
Black Lotus Strike
Twisting Fangs
Falling Spider
Blade of Steel
Tigers stance
Rez sig

what i do is keep my distance from all enemies until i want to strike an unsuspecting enemy and kill him instantly on my 1st try. I would aim for the person w/ the least defense, even if its just a noob war that doesn't know how to use frenzy. Try and stay at a different elevation as ur target, then use mark of stability+Aura of displacement followed by Black Lotus strike. By now you should have 22-24 energy(assuming ur max energy is 32), then activate tigers stance and use twisting fangs to KD them before they can defend themselves witha spell. Finish the guy off by using falling spider combined with blades of steel to do a crap load of dmg, and do any extra neccesary normal atks to kill the guy. If u fail to kill ur enemy, dismiss Aura of displacement and run away Regain ur energy and hp naturally while waiting for the 20seconds downtime of most of ur skills and keep ur distance from all enemies. U shouldn't have many problems of being targeted because ur just warping in and out of battle. Tigers stance is better than frenzy for a random arena sin because frenzy w/o protect spirit=gg even with cover stance because ud be half dead once u activate ur cover stance after getting hit hard w/ something like lightning orb from that ele far back you didn't see coming. Tigers stance, AoD, mark of instability, and black lotus strike all have 20 seconds of recharge time, and u can regain all ur energy/most of ur hp if needed during this time period. What i do after i kill somebody is i usually just sit there and wait till the guy i get killed gets rezed then kill him again in 3seconds before he knows whats coming because DP will allow me to kill faster. Always aim for the easiest target even if its not a monk and restrain urself from walking up and atking somebody unless u can, its better to just warp everywhere.

tiger stance is uncalled for

It's an ok build, it'll do what it promises. BUT: Why do you use 1 superior and 1 major rune? Too much health loss. Run dual majors, it's better, and leftover points in BM.

Hmmm personally I'd drop Crits down to 13 - having it at 15 brings no overall benefit aside from +2-3 damage and +2 energy of BL, and as for TF...an extra few seconds of Bleeding and Deep Wound doesn't matter when they are dead. Wheres you self healing? natural health regen isn't of much use in RA... Why Tiger's Stance? its a high cost Strength linked skill, if you really want an IAS use Flurry as its unlinked and the -25% damage does not reduce the output from attack skills(your source of damage) and if you're using Zealous daggers you gain more energy than you use.
Anyway, thats just my opinion lol. You have the beginings of a halfway decent build there, goodluck:-)

Oh wait.. I read Tiger's Fury, not Tiger Stance...

id swap tiger stance for wild blow!