5 Boomkins are INSANELY DANGEROUS at high lvls once you have the gear to support it. Ebola has 5 Druids on Mag US who're around 66+ now and can pretty much oneshot mobs with quintuple-starfire, let alone the wrath spam and moonfire/IS stacks lol

Best part though: Treants. A whole effing 15-tree Forest at your disposal! Proof: