Depends if your PVP'ing in which case i'd say 3 ACC 3 Dam.
But in PVE i would defo go 2 ACC 3 Dam 1 Recharge as it does help bring it back that bit faster and is pretty much the standard slotting for AS.
So yes .. throw one in and enjoy 
Defiant's GoEH/MILITIS METUS
Depends on a few of things.
What Secondary Pool does your Stalker have?
And what level is he/she?
Travel Power selection (Hasten?)?
For example if your playing a /SR Stalker pre Quickness that will be a contributing factor.
If you dont have anything that will give you a +Recharge from your Secondary then I'd aggree with Chels (only cause she'll pelt me with Snowballs if I dont), throw in a Recharge redux for PvE play.
I've got Ninjitsu and no Hasten, so I'm going to slot with the Recharge.
Thanks Chelsea.
"Idealism is such a wonderful thing. All you really need is someone rational to put it to proper use." - Kerr Avon
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Due to a sirens build My claws/nin doesnt currently have hasten, I'd like to have it but can't squeeze it in. :/
ps. I slot AS with 2 acc 3 damage 1 recharge.
I have had a siens calll build till recently there and i was slotted 2 acc 3 damage I put my extra slot on my build up.
4 sloted build up ftw in the call will cream nearly anything. (at lvl 50 I have it 5 sloted)
Plus I find that in the later lvls when you cycle through your chain of attacks your AS will be waiting for you again.
Is it worth putting a recharge in an Assassin's Strike?
I ask because I've currently got Assassin's Blade with 2 Acc/3 Dam and I find myself waiting for it to come back on the odd occassion after placating someone.
Is it worth the single recharge? I've never seen a guide that's got it, but I think it'll work with my playstyle.
Advice please?
"Idealism is such a wonderful thing. All you really need is someone rational to put it to proper use." - Kerr Avon
Myopic Aardvark on Twitter