Having done some light research on the subject, most "real" eu rp guilds are gonna go for the server ALPHABETCALLY LAST on the server list, just to maximize the chanses och a high % of rpŽers vs. "Zomg arrpee, lest trie!" people who will go on the top servernames..
I think a coalition HAS its merits in terms of knowing which guilds are rp-friendly, and whose members are ready to partake in rp.. Apart from that, its "hard" enough to run your own guild in a successful way (depending on goal ofc) if you have a huge organisation to adhere to aswell.. Good luck tho with all you are set out to accomplish, and hopefully i end up on the same server as yaŽin whatever guild i end up with..
RpŽers unite ! (but dont merge to much
)