It's a complicated system, and to be perfectly honest...you don't need a buff every time. I do just fine without a buff and rely on my scrolls and speed scrolls. Speed Scrolls are your best investment as a Farmer on an archer.
Lvl 125 drops, you should NPC and sell Rama potions for 50 silver to beat out the competition.
You can amass upwards of 15g per hour + all drops you obtain if you have a 100% rant active, and Shiny appearance rate allows it.
With the Shiny Slayer title and a t1 speed scroll, you will be moving at the speed of a t2 speed scroll which is efficient upwards til 7x really.
You're better off buying the mount that is currently on sale in the shop (3850, buy 5 of em) and find the one that really stands out to you to use as your permanent mount. Go to item merchant nina and YEET!
Or, you could get a 30 day mount and call it good.
I would also suggest camping the 3x for awhile and go grind 3x abyss for Slime Jelly, as you will need it if you intend to make higher level speed scrolls.
The best place to farm Summoned Beast Tails, well...you can find them off any Summoned Beast Mobs. The icon on their HP/SP bar when you target them tells you the type of mob they are and what they're ranked as.
*grabs popcorn* I'll be lurking to offer any more advice and tips *sips beer*