Assassin without Hidden Blades? I hope you get banned for this. Shame on you.
hidden blades CD too long.
with upgraded death blow I can just keep spanning it on normal mobs with +50 stamina per kill (although sometimes bugged for some skill kills) and +10 stamina per crit.
twin fang and flank attack are for mobility uses.
I usually stealth ahead of team and wait till teamate argo then twin fang the tough mob then keep stealth & death blowing range mobs near me then flank/twin fang for mobs little bit far away.
I almost dont need basic attack at all, even if I end up need to basic attack, I use "shift" to cancle animination after first hit,and then repeat.
3 good reasons:
1. this will give almost +50% attack speed,
2. and It will always use my better right hand dagger for basic attack for higher dps.
3. and this give almost +50% moving speed while attacking so I can easily catch mobs running to my teamates.