Delving and vaal rain of arrows from Exile

Heya,

I am having a hard time when I get to nodes that have multiple exiles, specifically the guys that shoot what I beleive is vaal rain of arrows. Roots me in place, and generally I am lucky to live.

How can I go about mitigating this? Anything I can roll on a flask, or pick up on the skilltree etc?
Playing SSF, so don't have access to all the uniques either.

Edit : I guess these stats on a flask would do it?
Grants Immunity to Hinder for (6-8) seconds if used while Hindered
Grants Immunity to Maim for (6-8) seconds if used while Maimed

Cheers,