Hey guys & gals; I am still levelling up so this is for Normal Shado-Pan. I am having some issues with Sha of Violence for both my teams

a. Guardian, Disc, Ele, Arcane, Surv -- Avg iLvl 415
b. Prot Paly, Resto Druid, Enh, Fury, Frost DK -- Avg iLvl 415

With the ranged group I have tried different room positions and groupings but the spikes are out-damaging my healing ability.

My questions:

1. When a spike is avoided are the lesser void energies spawned? Do you kill them and eat the damage or let them live?
2. How do you deal with spikes? They seem to spawn very quickly with only the ground visual for queues.

Thanks