i agree it needs some modifications in terms of damage so it can be playable in pve, giving it only a long channeling time ,IMO, wont be enough.
for example: chaos storm skill has a larger radius, pulsing AoE that does burst damage, keeps the player in channel mode till the pulses end, applies no condi nor boon, aether field.
to make chaos storm worth the channeling yet keeps you vulnerable so need to be fast with your blinks and evasions to not get interrupted.
:>
