Magic NB build for all forms of PvE.

Gear used :
5 julianos/Twice born star - All max magic enchants
2 Neireneths - All max magic enchants
3 willpower - All arcane with Spell damage Enchants
Maelstrom Staves or any destro and resto if you don't have them

This is basically the best possible build for PvE and is what i and many others use for Veteran Maelstrom. You can obviously swap some skills out for the likes of Harness Magicka, Refreshing path and Reapers mark for more survivability if you are struggling.

Tips for maelstrom:
Re apply buffs as often as possible, keep distance from hard hitting mobs/bosses, use sap essence only as a damage buff unless you're overwhelmed by adds. Try to use healing ward in emergencies only as your self heals from sap/funnel health/refreshing path are definitely more than good enough. Try to prioritize range casters first and use your ultimates wisely.

Hope this helps anyone who is struggling with maelstrom or just PvE in general. Enjoy :)