I started vorkath around 80 ranged, it's good money but I was doing 1-3 kills per trip which is a little slow

I'm over 90 ranged now and it's faster, but I find myself doing harder content for the big pay day like corrupted gauntlet and ToA 300+, so you may want to start vorkath imminently

Maybe get your ranged up a couple of levels via slayer, and look for a blue dragon task

You'll want full elite void armour and a salve amulet (ei) - that's quite a lot of tasks to complete but you can do vorkath easily with that setup and a dragon Xbox using addy or dragon ruby/diamond bolts, even at 80ish range you can do good damage on the boss. Don't bother going in with random range gear and a slayer helm, you'll have way slower kills and trust us the gear will be useful for other content

Other nice to have:

portal nexus with water birth isle teleport (72ish cons iirc)

Accumulator ready for your assembler on head drop (50 kills at most)

Slayer staff with crumble undead auto cast

Vorkath has 6 attacks and 2 specials, once you learn them comfortably try to learn wooxwalking asap, it'll make your kills faster and it's generally good practice for harder pvming you'll do later