Need some thief advice.
well, you could try going 30 into crit strikes and 10 into trickery, take 100% crit from stealth from crit strikes and might, fury and swiftness on steal from trickery, with valkyrie armor and berserker accessories.
http://gw2skills.net/editor/?fYAQNAoYVlUmaPHfS6E+JFy2jKsnIKOFGFT5Vgs0KQTA
think this with the valk/zerker armor/accessory mix might work for you?
edit: the point of the idea being rely on fury and auto crit to make up for your lowered crit chance
Gungnir Aurus – 80 Guardian
[AUX] Isle of Janthir
Well looking at the gear spreadsheet I made, I would have 443 precision from gear, 60 from runes, and 300 from Traits.
803/21= 38% crit.
Now dont we start with a base crit% of 4%? So that makes 42%.
Superior Sigil of Accuracy would bring that to 47%.
Then theres the randoms of keen observer (5%) and side strike(7%)
Do you think I need more crit?
well, for non GC, not necessarily. if you take the auto crit from stealth your BS is unaffected by crit chance, then you get 20% crit from fury for 10 seconds from both steal, and the enemy below 50%(if off 45 second CD) traits if you take them. so 47% base, but 67% with fury up, and auto crit back stabs. as long as you dance in and out of stealth, you should get more than enough damage out to drop someone
Gungnir Aurus – 80 Guardian
[AUX] Isle of Janthir