Should I upgrade to th 9 or should I max my th 8 base out!

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In my opinion: Always max. Do you want to be a very strong th8 or a relatively weak th9? No reason not to max walls since you can now use elixir, and in the time youre upgrading those walls you can also max de upgrades

Not yet.
Max your teslas and ATs. Upgrade your Golem and PEKKA too.