什么时候能解决啊

I love this game, and the more I play it, the more I figure out how it works. But I'm stuck on Level 6 and don't know how to get past it. Several times now I've built the best team I can think of and upgraded as much equipment as I could. But the Demon Lord mows my teams down in about 5 seconds. I don't understand what I have to do to conquer 18 Level 5 mobs, including a formidable boss, with a team that only consists of 7 Level 4s and 3 Level 5s. As far as I can tell, I've completed everything I can find...

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As above so below

seems pretty dead here, is this game abandoned?