In FS, what if, above Titans, we added something like a Colossus? It would drop a primary item that would be guild-related, not player-related, along with an additional item that could be player-related. The primary item could be a new structure or even develop a new guild-related category to go along with structures and relics, such as a guild crystal or or guild beacon. The structure, crystal or beacon would offer an additional benefit to the guild as a whole.
What seperates this from Titans is that becasue the primary drop is guild-related, there is little benefit to one guild being piggish by continually going after the same Colossus, since the primary drop is eally only beneficial once. Of course, guilds could still go after the Colossus since there will be secondary drops that would yield items similar to Titan drops.
The Colossus would require a far greater effort to kill, above the effort required for a Titan. Perhaps five times the effort to kill, thus it would warrant a greater guild involvement.
Example: The guild with the most points could receive a Colossus Structure that added some attribute, such as extra stamina, additional max stamina, or an increase to an enhancement. Additionally, the top three of five individuals with the most skills would receive a drop of some potions or something that once used, is gone.