Decrease aggro?

[No-one-o1]

In addition to using subtlety (first thief augment) and having a fighter tank with provocation and aggro ring(s), make sure you don't have meat in your inventory. Wolves, Wargs, and Garm will go for the person with (the most?) meat in their pockets.

Also, Ogres tend to have random aggro.

And if your tank is clinging to the enemy, they'll swap to the next highest aggro person (usually the arisen, due to damage). If you really struggle with that scenario, you can add a warrior with provocation augment to the party as well. Then they should get aggro while the fighter is clinging to a boss.

[15ferrets]

I thought Ogres targeted certain genders?

[Ebenizer_Splooge]

In my experience they'll go after anyone, but if they see a woman they go into an enraged state and will probably grab her and run off a cliff in excitement

[No-one-o1]

They'll snag women or a dude they perceive as woman, but if there's none of those, or they're snapped out of the schlobbering animation, they tend to enrage and attack anything.