VS [Volt] needs to have high duration for the shields to last 3 limb rotations and to stay long enough for preshields
Each eidolon limb rotation on a good squad is roughly 18 seconds. 18x3 = 54 seconds
At 238% duration the shields last 59 seconds giving us 5 seconds extra just in case. 220% duration or higher is generally good

High Efficiency since we are gonna be placing a lot of shields down

Subsume
Dispensary is perhaps the best subsume for VS [Volt]. This will provide you and your squad energy orbs throughout the fight saving you from wasting energy pads

[Preparation]
Assuming you already have forma on your [Volt] and have extra mod capacity I highly recommend putting on [Preparation] mod so you load into POE (plains of eidolon) with full energy. This mod will save you from wasting energy pads.