I don't know if you can unlink the buff cooldown, you can decrease it at
dbo._RefGameWorldGroup_Config
And you can unlink/decrease the item cooldown by changing Desc10_128 at
dbo._RefObjItem
Code:
SELECT * FROM dbo._RefObjItem WHERE ID IN(SELECT LINK FROM dbo._RefObjCommon WHERE CodeName128 LIKE '%HOLE%') AND Desc8_128 <> '***'
I guess you can by assigning a different GameWorldGroupID to the Level 1/2/3/4 (w/e you want) at
dbo._RefGameWorldBindGameWorldGroup
And adding a new group with the new id you added on the other table at dbo._RefGameWorldGroup
And copy the old one from dbo._RefGameWorldGroup_Config and change the codename to w/e you did on the other table and modify
ENTER_WORLD_GROUP_COOL_TIME
TIMEDJOB_COOL_TIME_FORCLIENT
those has 300 by default in minutes (5 hours) change them to w/e and it technically should work.