it realy depends on attack speed!
the more attacks you can dish out so if you can dish out 10 attacks in 5sec
now you have 10sec duration now its double the amount
rupture aspect lets you put another new flay stack while the old one is burning down this is how you see higher number bleed ticks and you will notice this if you stop attacking you will see a flay stack drop off
also bleed ticks are .5secs so every 2 ticks is 1 sec