Sorry, I just think this is bad advice. Don't go to C1/C2. As a TH8, you will get crushed and any DE that you raid will be taken as soon as you log off.
As for OP's question. I say max defenses and move on if you're already questioning the skull wall's merits. I rushed to TH9 (L6 walls at the time) and now have a combination of L7 and L8 walls and do just fine. I have maxed splash and xbows that mow down any farming army that comes my way. Unless someone wants to hog me, they aren't taking much. You won't be at some low point of the game that's detrimental to your fun if you don't get skullies. I think having troops and defenses maxed is more important than walls.
On the other hand, I would caution you that your skully progress is going to be essentially stopped at TH9 for a while. All of the TH9 upgrades are fairly pricey, and it can make it difficult to save for walls on the side if you don't raid often enough.
You just have to weigh things out for yourself but in short, your game won't be ruined by skipping out on completing skullies, you may just find yourself working on them for a while longer than if you had stayed at TH8 and chipped away at them.




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