Hydras are aiming where people are, not where they move.
This means doing precisely Zero dmg in pvp.
IF you were fighting someone that sadly d/c’d or went afk?
Then hydras would still do precisely Zero dmg because low chip fire dmg can easily be completely negated from mdr/sorb.
You could maybe have a chance to win against a random afk noob that forgot to equip his gear… maybe… I would still bet on the afk noob tho
Good luck
(A bit humorous, but still mostly true)