I will share with you my insight into some weapons, coming from farming M3 Shaft even when they have +40% damage AND +20% fire rate etc.
Ghost Call grenade. It is absolutely godly and is one of the keys to easy M3 Shaft farm. You have to aim it
Freeman. Targeted farming from the Warden in the Anvil. Having played her so much, it is able to still be one of my top choices. You will have a good time in M3, especially if your other gear comes together
Obviously Ogre, but probably a random drop, and more for regenerating Ghost Call grenade and cooling down Iron Bear for Some for the Road heavy spam, than for its own damage. If you are able to find Anointed +Splash damage for 18 seconds gear, Ogre becomes optional, you can risk reloading from time to time and use a fun AR of your choice if desired
Jericho, probably obvious, think is also random. But it gets obnoxious with the Some for the Road spam
Hive if you have the patience for rares, if you didn’t pick it up the week when they always spawned and dropped. Princess Tarantella in Splinterlands on Pandora
The most important by far are an 18 second +Splash damage Anointed weapon and Ghost Call. It seems the buff remains through weapon switch. But such an Anointed weapon may be difficult to come by, so aim for Ghost Call + Freeman - guaranteed to be a big boost and should be relatively easy to farm
Use a Stop Gap shield and full health
I might have to spell it out and say use Auto Bear with splash weapons. If you really have trouble regenerating grenades, then use Ruby’s Wrath instead of Freeman, or as another one of your weapons. Of course, this is moot if you have an Ogre to use for sustain and regen.