Its easier and more forgiving to just make a base capture chain with limited assets that are unlocked by base captures.
Basically each side gets unlimited Cbills but until the first base is captured by the attackers each side can only use 30 tons and less equipment but once the first base is captured both sides can then access a bigger weight class until the last base is left and everyone can buy assault mechs.
Unlimited respawns and money, goal of the game type is for the attackers to take all of the bases before the match ends and the defenders to stop them from doing that. This would also help alot with asset testing and there will be no limits and every single asset will be thoroughly tested to see if it does better then other assets.
I like the idea of 1 lance of mechs VS a team of infantry, with the occasional air-dropped empty mech for the IS side to jump inside of. The goal of the IS team would be to protect the air dropped units and eventually take the clan Dropship base outside of an urban area. The Clan's side would be the destruction of barracks buildings where BA units would spawn. Would make a really interesting battlefield, especially if the teams were uneven on purpose. (25% of server pop only allowed on clan side, 75% on IS side)