This is very cool for practicing, but I'd like to see one change.

I would like to practice 2-tick flicking ranger and mager. For this purpose I just turn on invincibility. However, if my HP is zero they always hit a zero (unlike Zuk whose damage always shows), so if I failed I have no way to know if I am correctly flicking anymore.

Could you add an option to always simulate their damage if you have invincibility mode on, so that I could practice 2-tick flicking? Thank you!!

Dinh's bulwark is bugged. It delays attack by 7-8 ticks after swapping to it/back to bow. This effect should only happen when the shield is on Block attack style.

Brews seem to be reducing stats too much

Thats the most awesome osrs tool ive seen, way better than those old jad practice tools.  Thank you so much for that. Also if you have source code for the underlying engine id be super interested in porting this to some other bosses!

May have encountered a weird bug.  If my inventory is completely filled, when I click to equip different gear, such as swapping justiciar body with crystal body or vice versa, usually nothing happens, leaving me unable to change equipment (both in the lobby and in the inferno itself).  It was reproducible for me if I refreshed.

Can you please add Guardian Boots?  Really fantastic item for inferno runs but I can't test with it since it's not in your gear closet.

Edit: Divine bastion (and divine ranging) potions would be great to have too!

Are there any intentions to add any audio to this any time soon? A metronome would also be a considerable gamechanger.

Any way to make the keybinds qwerty or is it only 1-5?

There's a bug that continuously spawns the mages and rangers after they spawn. You may need to add a check if they're already spawned and if socan more spawn before the next threshold.