Clan wars so far
I'm really enjoying the clan wars update which has really boosted gold earning potential with the loot bonus you can get from winning a war. I have being upgrading a few things and am aiming for all level 10 archer towers and I have one more wizard tower to upgrade before everything is maxed out at TH level 8.
I really like the war system of it not affecting your trophies, traps etc. being able to attack when shielded and the loot going to your clan castle which acts as a bank and you withdraw it when you need it, with this you can keep the loot and your shield, then attack a few times to get the extra loot needed to upgrade stuff.
Being in a good, war focused clan which donates before the war. Everyone who can in mine donates dragons to everyone who can fit one in their castle.
Mega Loot
Ideally you need to earn as many stars as possible for your clan to win the war, and winning the war is more profitable than losing regardless, But I have been getting about 500k gold and elixir and 1.5 - 2k dark elixir most wars and my clan has only lost 2 wars so far.
How I usually tend to go about it is to (usually) 3 star somebody with a loot reward of about 130-170k and then make sure that the war is going to be won before attacking the highest level opponent with the most easily defeatable town hall to get one star (still aim for more) and get the loot bonus, even if somebody else had already attacked them before.
Example of a base with a 345k loot reward and a town hall easily defeatable.
this war I earned 520k loot bonus in my clan castle.