I recommend Verglas with heat-based damage (I have a build for that.) If you do not have heat damage on your sentinel weapon, swap out [Fired Up] with [Accelerated Deflection] for added survivability.

If you don't want [Djinn] to [Sacrifice] himself to revive you, use [Primed Regen] instead. [Primed Regen] will circumvent the long cooldown on the first few revives and revive [Djinn] instantly instead.