Just had a thought. If the marines aren't currently centred around the druid then we could do something like this...we teleport the three commanders in ahead of Lamorak (we're expendable if it doesn't work).

We teleport in next to the druid. Prior to DD Maiabel readies an action to attack the druid if it casts the scroll, possibly disrupting that (or go totally wild and try to sunder it). Cypher would hopefully be places between Maiabel and the marines, and buffs his AC before teleporting in. Sharkan (under superior invisibility?) Rakes the deck with a fireball to soften the marines up a bit.

They should be able to survive a couple of rounds after that before the boss arrives to out the nail in the coffin