are you ready anything, like at all?

Positioning is not at all my arguement it's just a bonus point.

Sneak Attack does 500 Potency.

Trick Attack Does 400 Potency + damage +10% for 10 seconds.

This buff is for all party members.

A ninja can easily put out 120 additional potency in that 10 second window without auto attacks.

so now we have Sneak Attack 500 and Trick Attack 520 + party's additional dps in 10s

Therefor Trick Attack is the better DPS, no question.