It's been a while since I played a druid.
How bad would be a caster druid with 41 AP in Feydark Illusionist? Perma displacement is fun; Color Spray is great, Season's Herald tier 5s are not so great (I guess Word of Balance SLA is probably obscene, but other than that).
High-DC color spray + plinking mobs with cheap single-target SLAs should be okay until you get some post-pass AoE spells. Not sure which Druid AoEs are useful these days, post-spell-pass. Help?