I’d watch @LilMaddogHT vid on farming. I used to farm v7 2.2, but now I’m able to infinitely farm revives from 5.3.6It’s a much better system, because you can continually do it without spending any units. It also yields way more revives.*that is, if you do want to farm revives.
Depending on Skill it might take little units. Took me 3 revives 2 20% and 1 40% but I was pretty skilled for that fight as I watched multiple videos on it