1) Crisis 2) Misa 3) Nitro 4) Enchanters 5) Krypton First five things that came to mind. I don't know which ones are available.
Nitro and Krypton have already been used (don't know if they are currently being used though) and there's a faction called Krysis
There's already a "Crisis" faction. I just checked. Plus, you want a name that looks good. Krysis looks better than Crisis
There are two very hard things to do in factions: Deciding a name Trying not to get raided when 20 people have their home set in your base