You can challenge the Fight Caves and TzTok-Jad to receive a fire cape, tokkul, and the TzRek-Jad pet using the
/activities fight_caves command. Better range gear will reduce the time each attempt takes at a rate of roughly 1% per 5 attack value, as will total Jad kc.
You can equip your best ranged gear with the autoequip command
+autoequip range attack ranged
The number of total attempts you have made will determine your chances of killing Jad when he is reached.
You can make 4 dose potions from 3, 2, and 1 dose drops using the
/decant command. Should you fail before the final wave, some of your potions will be refunded.