It finally happened - I got the twisted bow!
I was getting so close to it, and I noticed that the dragon hunter crossbow and dragonfire ward had been peaking in price recently, so my gut told me that they might crash in the near future, and I decided to sell them and some miscellaneous stuff to finish this off!
Now, until I get enough money to buy back my Vorkath setup, Zulrah is the primary moneymaker, and after going to test the bow there, I already got another uncut onyx and serpentine visage within the first 12 kills! Ranging Zulrah is much cheaper than maging it too.
Finally, below is the list of monsters and bosses that I'm now looking into doing, either on my spare time or during slayer tasks, with the bow (some are old, but faster dps with the bow).
1. Zulrah
2. Cerberus
3. Brutal black dragons (also blue until Vorkath)
4. Dagannoth Prime (maybe even Supreme)
5. Giant mole
6. Abyssal sire
7. Deviant spectres
8. Fight caves (pet hunting in the future)
I might have forgotten about something, but that's the list for now.
Cheerio for everyone who supported me through this; this thread has come to a close! > )