@chrightt said in In-game guild ranking.:
(...)there will be pvp, so regardless of their "guild related" content, there will be zergs(...)
Plenty of PvP players are 'min maxers', since that's a crucial element for success in PvP battles. If the PvP relevant bonus/benefits granted through guilds diminish with the number of players, there's a high incentive to stay with a tight, small group of people.