[Edratman]

Other chassis that I have used are Tree Lords, Tarrasque and abominations. The last two only have 2 slots, but they have plenty of hit points. And I believe all 3 are not unit limited. I've used them because I could get them.

Basically, you need to make use of the highest hit point units that you can obtain. They all work. Some are better, but all can be killed somehow. Wish obtained Seraphs are great, but very expensive and if you don't have access to 2W1N (?) mages, clam spamming is not viable and Wish all but out of the question. Arcane nexus fills the bill, but it has the same problems getting to as Wish.

I think the cheapest SC's obtainable are Tartarians, if you have death.