I'm making plans to play against my friend some time this week(end). He put together a 35pt gator army that he hasn't got to use yet.

I only have the follow models currently in my possession:

Siege
Grenadier
Stormwall (currently unpainted, but playable)
Storm Strider (currently unassembled)
Trencher Infantry (full)
2x Trencher Chain Gun Crew
Trencher Cannon Crew
Trencher Master Gunner
Finn

The bulk of the army (everything other than the two huge models, and extra trenchers) were for my starting 15pt theme army that I originally built.

The trenchers will give me a nice screen for the Stormwall, though won't last long in melee. The pods will give me some untargeted attacks (because submerge/amphibious/whatever-it-is is going to be a problem) and will give me targets for an Explosivo'd Big Gun shot; Ground Pounder will also help with the ponds. That will all become moot once his army gets up into melee with me though, and starts chomping down on my infantry.

Any suggestions on what should be my final list? I know there isn't a whole lot to work with.

The list I'm considering is:

Siege (+5)
- Grenadier (5)
- Stormwall (19)
Trencher Infantry (full) (9)
Trencher Chain Gun Crew (2)
Trencher Chain Gun Crew (2)
Trencher Cannon Crew (3)
Trencher Master Gunner (free)

I could slap the Storm Strider together if I needed to, if he would make a big enough difference.

Thoughts/suggestions on army list or tactics?