Here is the setup I took. I never actually got the cape, but that was because I kept messing up and getting in the melee range of the 360's.
I'd highly recommend having some extra restores in your bank as well as brews that way before you start you can take a sip of each and be pretty safe for the first few waves until the 90's come around.
Also think about using the spa's from "As a First Resort..." to boost your Prayer (can also use an Ancient Mace) and possibly the infinite run spa.
I'd recommend using one Range potion when the 360's start rolling around, and save about 1-2 doses when the 360's and 90's start coming so you can kill off the 90's faster and take less damage. Save a full potion for Jad, or at least 3 doses.
Here are my stats:
HP: 86
Ranged: 76 at the time of trying (78 now)
Prayer: 70
Defense: 85