Me and my friend went to kill the Armadyl boss a couple of days ago, and I noticed that the minions attacked me far more often than my friend. Why is that? If this helps, my defence level is 90 using the Rigour prayer, no overloads. My friend has a Defence level of 99, uses leech Defence and has overloads.

All 3 minions attack one person based on attack timing. If you stop attacking Kree, all the minions will stop attacking you (assuming you aren't alone in the room).

 

Long ago when I used to GWD and I was the weakest link on my team, I would quit attacking Kree once all 3 would turn to me, and resume attacking when they retargeted. Since everyone used a rune c'bow and had the same attack speed, they'd stay focused on the same person the whole time until someone missed a combat turn from eating or running around or whatever.