[sblock=marching]It depends on how wide the tunnels are. If they are 10ft or wider, then we should probably do something like this:
Gurdan Grryth
Lo-Kag Garrick
Riel Alexia
This puts our defenders and the action-granting Lo-Kag in the front. Alexia is tough enough to hold off minor ambushes, and has enough ranged attacks to not be useless if there's a bottleneck.
If the path is only 5 ft wide, then something like this would be good, probably:
Gurdan
Grryth
Lo-Kag
Garrick
Riel
Alexia
As for spacing? Well, now that I know we'll be facing aoes

angel

I'm tempted to say we should spread out as much as possible. More practically. if we're using the first one, then 5 ft between everyone. If there's room, maybe even spread out more to avoid burst 1s. If we're using the second, then 5 ft between each pair. Spreading out more will put the people in the back very far away from the action. So sort of like how I spaced it out.
Anyway, that's my suggestion.[/sblock]