The beginning of the end is here...
Anyway, I'd recommend rich here just so you can start building a damage stack as soon as you can. Naala and Hermit are excellent here for being able to tank a long time, and getting a bunch of damage in at the same time. Use Doron once you have pushed the metals back a decent amount so you can guarantee that his freeze actually hits the Dogus (have had my fair share of surge RNG messing up opportunities). The Aku Gories are the biggest threat you'll face in this stage, which is why I like throwing in Housewife and Fiend just to add to the DPS stack.
Try to push the Dogu back as far as possible so you have plenty of room to spare in case Aku Gory starts heavily pushing you. You end up playing the same wave/LD game when the second Dogu comes out; just make sure to properly time your units so they don't get absolutely nuked by Hackey. Other than that, once the second Dogu dies, you're pretty much out of worry, but be a bit careful with any remaining Aku Gories. I would get the metals dead as soon as possible so you can keep pushing the enemies back.
Modern 39
Manic Eraser 44
Eraser 20+60
Hurricat 35
Hermit 40
Jelly 40
Housewife 37+3 (Savage Blow 10)
Fiend 39+1 (Target Angel)
Doron 30
Naala 40