I've been keeping a builder free usually but being on vacation I just put em to work.
My current raiding strategy has been a dozen giants, 18 gobs, a healer, 6 wall breakers and the rest barbs. It's good for taking over most bases that seem abandoned with weak defenses and high loot. I realize the cost is high, but I only go for bases that yield in the six figures for gold and goop.
The walls are coming in slowly, but I've been mostly saving and spending in maxing out the rest of my buildings. Upgrading barracks takes a toll when it brings you down to only two.
I'll admit, I haven't looked into the best strategies. And I've never been a part of an active clan, so I don't know how the warring side of the game works.
Just a little advice for you. In general, you want to upgrade your splash defenses first. So, mortars, wizard towers, canons, then archers. And, yes, upgrading barracks is really frustrating because it really slows down how long it takes to train your troops.
The clan portion of the game makes it a bit more fun. There are two main types of clans:
1. Farming clans - never go to war
2. War clans - warring constantly
And, everything in between. The dynamic in each clan is slightly different. It's kinda like finding your your own section of BARF where you're happy. If you're looking for no drama, the farming clans tend to stay together longer. They're really all about helping each other. There tends to be a lot more drama and turnover in war clans. If you ever lose a war, you will always have at least one person rage quit and move on.
I'm in a farming clan right now where it is actually hard to donate troops. As soon as someone puts up a troop request, it is filled in less than 2 seconds. The fuckers are fast. It makes it a bit more fun.
Oh, and since you've never been in a clan, the app tracks how many troops you donate and how many you receive, and it's visible to everyone. The number resets every two weeks. That makes it so that the rest of your clan can see if you're mooching off everyone. In general, most clans like you to keep that ratio about 1:1. In my clan, we like 1:2 because everyone donates. So, we give each other shit if people are not helping people get their numbers up by requesting troops.
edit: one last thing, if you're just farming, you should put your town hall on the outside of your walls at the edge of the area and leave it undefended. This essentially buys you a shield for $1,000 or less (depending on who attacks you.) You lose trophies, but it's better than someone coming in and taking a shit load of your hard earned loot.