As we know in Knight boss is what you want for drop anyway. First you will need to maximize your AP so you can kill the mobs in the given amount of time (30 minutes) , if you do not manage to kill them all, make SURE you kill the last boss by skipping some mobs.
Besides, the mobs aren't that hard to kill, and int priest managed it with an average club, but you truly needed to maximize my AP to be able to do it within the time limit. By the way you can take about 3x the amount of time for the boss in comparison to the regular mobs in there. You dont need expensive items(knight online gold) like str+8 sets and smite hammers etc. Sure thats one way of doing it, but there is far far cheaper way.
At level 59 you should have stated enuff to where chitin+7 which is 102str 172 int. So you can do the quest (level 55 cardinal quest), and DO NOT DELETE the hammer you recieve from it ( Tamed Orc Punisher). The AP of this hammer is calculated on your INT, not your STR. Make a small shield +7/12 with INT as bonus and buy all old uniques with INT on them. Enter monster stone.
Please dont use books. You can take the AP boost from the enchanter in there. You can sail through level(Knight powerleveling) 73+ monster stones in 10-12mins, not bad considering the strength is only 106! Hopefully you will listen, because without doubt this is one of the least known facts of the game. Smite hammers, stone splitters, leonards etc AP is calculated on your Str. Plz give it a try because it is such a simple and cheap way to enable INT priests to actually do some damage. All you need is 106 str to use the club.