Group #1: there are many hard bases in the war which group #2 won't be able to 2 Star/3 Star as well. Your goal is to 2Stars as many as possible in the [Group 1 Target], and 3 star if you can. If you scout all the [Group 1 Target] and you don't think you can 2 star any of them left, you may go attack [Group 2 Target]
Group #2: You guys got more easier bases compared to Group #1, so aim to 3 Stars them as many as possible. You may look into Group1's target and if you think you can 2 Star any, give it a try to help out Group #1.
Group #3: Same as Group 2, but for weaker targets. You guys got the middle tier bases so aim to 3 Stars them as many as possible. You may look into Group2's target and if you think you can 2 Star any.
Group #4: Those in Group#4 don't be discouraged being here even though there are many of you. You play an important role in this clan to Clear the whole bottom people and get all 3 Stars. Same ideal, you may attack Group#3's target if you think you can 2 Stars at least.
If mostly all of your group target (excluding Group 4), have been 2 starred, and you still have your second attack left, you may go and swept any other bases in the group below you.
Sorry to those who aren't on the list, as some people are new and I haven't updated. Just try to place yourself in the correct group and help out.