Ok will try to answer all your question in 1 post.
First of all i wont be in that situation because all my friends are studying in their sernior year just like me. Im kinda the only 1 left who still have some time to play L2 beside my college. And if they still playin L2 i woudnt apply for any clan, cause we'd start our own clan already. I have never been in this situation before, me and my friends are all mature. We are all 22+ and we are senior student therefore we dont have time or sense for acting immature.
Anyway lets say if ill be in this situation then id analyse the situation first and then ill defend the 1 whos right cause im not gonna defend some1 whos wrong because of his emo action. This all said dont mean im not loyal the clan but i wanna clear things out that ill defend the 1 whos is right at that moment, whether it will my real life friend or my clan mates!
2nd im from the Netherlands (gmt +1) and ill be playing after dinner around 18.00 o'clock.
Last, i dont mind playing EE cause i like playing supporters, but like i said to Shao already, this all depends on clan based goals and strategy.