Introduce weekly guild quests. 
Weekly guild quests that can be done on the three main servers of your guild simultaneously. 
Grind quests that require you to kill a set number of monsters, for instance kill 30k monsters.
Same for life quests, for instance gather 15k lumber and 15k rock and 15k blood or meat.
Make it so that these quests can run parallel to the daily guild quests.
As a reward for these weekly guild quests,
I suggest we get covenant of bloods required to get guild buffs you normally get from guild drills.
The reset time would be from maintenance to maintenance.

what is needed to complete a guild drill?

what does the guild drill do?