oh those were the days lmao I remember soloing kurenai rep as a challenge (got exalted too), though relative ease is YMMV - needed a LOT of kiting space as I recall.
My go to cheat code is always hunter with either leech or spirit beast pet lmao. Though, if you're farming that one klaxxi rare in western vale, take it down to like 50% HP then kite it to the shado pan guards and have them kill it for you.
Pray to RNGesus basically. I've also found that physical attack hit% > magical attack hit%. Killing Poacher Zane on my mages are a chore and a half compared to the same on pally.
Just out of curiousity what are you trying to farm exactly?
I'm saying you should park your warrior at skyhold, then log in 5 min before the chest is due to spawn. It spawns at every 3-hour mark same as gurubashi arena (PST timezone ofc), so it has really predictable spawn times.
You have to be at the arena right before the respawn timer resets. I have found that someone has to be physically IN the class hall before the chest will spawn (especially obvious when two of my warriors are on low pop RP realms and never see the chest unless I log into the char 5min before, so...
an easy way to check it is going to the mount's spell page (not the item page) on wowhead, and looking under "Taught By" section to see req minimum (aka learn) level.
Buying stuff at the trading post + run missions for Medallion of the Legion basically. Any excess garrison resources are good for two things only - mats for hexweave bags (as an alternative/stopgap for Lightless Silk Pouch) and mats for proccing the ever elusive Lil Leftovers lmao.
Edit: SORRY...
If you have Helpful Wikky's Whistle you can get 1-2 motes out of every bag. It has a 2hr cd and require 50 kills for each bag, but it's a guaranteed drop from the bag so you can kill two birds with one stone if you're farming anything else PvE-wise (e.g. BFA world drop mounts, WoD bodyguard rep).