Long post incoming. TL;DR:
Jad task on Alora would give 348.450 xp an hour for an EIM. Compared to hellhounds (166.483,2 xp an hour) that's way too much. Suggested: change xp rates so EIM's would get 207.000 xp an hour (15k xp non multiplied for jad task).
Moving on to the long post:
I felt like giving the jad full XP might be overpowered, so I ran some numbers:
I'm going to compare the xp rates of a jad task to a hellhounds task (I assume this is one of the best regular tasks for xp/hour). All calculations were done on an account with max combat. I don't take into account how long it takes to get a certain task from a slayer master (by canceling tasks until you get the right one). Both tasks are executed with complete focus on the game (meaning minimal 'downtime' between kills). The numbers that I use will be based off EIM xp rates as that's the account type that I used for these tests.
Gear for jad task:
Elite void + max ranged gear + blowpipe + rigour + ranged pot
Gear for hellhound task:
Tentacle whip + max melee gear + piety + super combat pot (no cannon)
- With the above mentioned gear and execution, I'm able to kill 312 hellhounds per hour in Nieves cave.
- Jad tasks with the above mentioned gear and execution can easily be completed under 20 minutes (as a super donator starting at wave 41, my pb with this gear is 16:27). For convenience's sake we'll assume that a task takes 20 minutes on average.
This effectively gives the following xp rates (with the well active, but no other bxp on):
Hellhounds: 312*116*4,6= 166.483,2 xp an hour
Jad task: 25250*(60/20)*4,6= 348.450 xp an hour
As you can see, there's a big difference between these two. The Jad task is already one of the better tasks on OSRS for xp, but with donators starting at wave 31/41 xp rates become way better on Alora.
With this in mind, I would suggest giving about 15k (non multiplied) xp for completing the Jad task. On an EIM this would result in an XP rate of:
15000*(60/20)*4,6= 207.000 xp an hour.
This would still make the jad task one of the best tasks to complete (like it is on OSRS), but not crazy overpowered xp wise on Alora.