[Suggestion] Pact Mastery: Mentoring
That would still be exploited for farming, even more so because of the mastery system.
So your asking for rewards that will be used for farming instead of..
Speed boost only in none pve citys cant be used for farming.
Revive speed on everyone increased cant be used in farming but will make sure people start reviving the downed and dead more often, so no use in farming.
Crafting boost cant be used in farming but you will be able to level crafts faster removing materials from the economy instead of adding like farming would do.
Auto loot he only thing that can be used in farming but its just a quality of life feature.