I can help on two of those. First, the EVERLASTING server is really good at public announcements on both sides. I've run multiple DFB on red and blue, so weekly raid should be easy to spot. Also, use or create such items on the main server thread, while seeing if you can get some old friends on this thread as well.
For example: https://forums.homecomingservers.com/index.php/topic,1963.0.html Hamidon Raid - Blue Side
Also, if you want to restart Legion of Catgirls, you should do so as soon as you hit level 10 on the appropriate side. At that point, you can hand the saved name to a guild leader or officer when the time comes, or restart it on your own. We lost the name HAUNT on Indomitable and had to go with HAUNT INC instead. You can't count of keeping a supergroup name if you wait too long. After all, in our case, there are at least 15 other HAUNT guilds in WOW alone: https://worldofwarcraft.com/en-gb/search/guild?q=haunt
/salute
Thanks, Laylyn.
On the Legion of Cat-girls (and Cat-boys), it's not a Supergroup per se, just an informal gathering of similarly themed heroes. Is there an option for that in game?
Thanks, again.