I run subletly (and still don't know how to write this damn word) and these talents:
Tier 1: Shadow Focus (for a free opener, saves alot of energy for actual damage)
Tier 2: Combat Readiness (Very nice against warriorteams, but they basically destroy you through because warrior op) Nerve Strike is also a good option. Personal Preference here.
Tier 3: Cheat Death or Elusiveness if you can keep it up. I tend to forget Feint so i run Cheat Death, because you can just vanish when it procs and recup up.
Tier 4: I personally run shadow step because of rogues current (rather bad) mobility. You have to play alot more cautiosly though because you can only vanish once (YOVO)
But i see alot of people play Preparation in Arena anyways, mostly in 3s.
Tier 5: Paralytic Poison is really nice for that random stun. Just get an indicator like WeakAuras to show you how many stacks the target has, so you don't accidently kidney into your paralytic. Happens to me alot.
Tier 6: Shuriken Toss hands down. The ranged damage is just too good to finish of a target or for quick Combo Points.
Poisons i use depend on the enemy comp. Paralytic/Wound for melee teams. If theres a healer or casters i switch to mind numbing.
With 5.2 we get Preparation as a baseline spell which makes our (currently shitty) survivability alot better. But we'll have to wait what talents actual get on live in 5.2. PTR is still confusing about the talents.
Almost forgot glyphs:
Major: Blind, Cheap Shot and Garrote are pretty much mandatory, against melee teams you can switch Garrote to Cloak of Shadows or Feint(with Elusiveness)
Minor: Blurred Speed, Poisons and Safe Fall. I use these because i do BGs and faster poison switching is always nice.