Shouzas: Moves towards the nightshade, but stays on the edge of the roof. Uses sonic breath weapon, but makes sure he doesn't hit Maur.
(3d6 sonic damage. DC 18 Reflex save half.)
One large spider attacks Caerth; one large spider on the roof attacks Shouzas (the scorpion gets an AoO); one large spider on the roof tries to web Maur.
@Neurotic, so Maur gets hit by a web and is entangled. Maur can break free with a DC 13 Escape Artist check or a DC 17 Strength check on his turn. Escaping in either case is a full-round action.
The webs have 12 hp and DR 5/-. It doesn't require an attack roll to hit the webs.
Maur gets a +5 bonus because he has something to walk on or grab (the table) while pulling free. I should have given this bonus to Angus too when he was breaking free.