should I even do campaign mode?

He's referring to the achievement: Get Those Goblins! [Win 150 Stars on the Campaign Mode]

And yes, do the campaign when you are on a shield and need resources

I'm actually saving the last 3 levels for when I hit TH9 and I "hit the wall".....then I will make the goblins pay for their iniquities!!!!

The final levels have tons of loot, but really the ♥♥♥♥ loot from the other like 45 sort of drain any decent reward.

I'm trying to do all that which can be done, both in single player and multi-player, so in addition to coins, elixer, gems, Xp points, level up assistance, and plain ole experience, I get the satisfaction of knowing that I completed another aspect of the game, so, at least to me, it's worth it.

To be honest it really isn't that worth it until the long run. If you have decent troops - let's say level 4+ and a good sum of elixir to lose then go for it. Just remember to earn back the economy lost from the troops that you have spent during the raid, unless of course this doesn't matter to you.

thanks guys.

I found the SP missions great and still use them now, not just for the loot, all that has run out, but it's good for practicing attacks and working out new tactics, especially when they updated the wall breakers AI! Now I'm a pro wall breaker ;)