Unstable Wall of Elements shouldn't be on that list. It's a damage skill, with both burst and DoT damage, for bosses and trash packs alike. It also fuels the benefit from Maelstrom Arena destro staffs.

I've been a big Critical Surge user even through the nerfs. If your spammable is a Force Shock morph, proc rate may remain good even after the upcoming nerf disclosed this week.

I run solo pve so any buff I get, I have to provide. Crit surge, major breach (either EleDrain or Caltrops), Boundless Storm. I get a crit% boost passively from slotting Inner Light.