Straight from our man at Zagenda, we got a list of requirements that will make you viable:
REQUIREMENT TO HAVE OR TO WORK ON:
Ironskin +50
Haste melee 50+
Range haste 50+
Arrow ward 50+
Volcano 75+
Toxic Rain 75+
2x R90 of your choice 75+ (r90-1 + r90-2)
Magmastorm 75+
Needles 75+
Wall of force 75+
Blind 75+
Heal other 75+
(updated)Sacrifice 75+
(updated)The combination to be used here upon called AOE burst;Wall of force --> Volcano --> r90-1 --> needles --> Magmastorm --> r90-2
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Forgive me if its abit unclear, its a direct copy/cut.