As a hunter, how do you contribute to spell cleave groups in the best possible way?

As title. Have been in a lot of groups with warlocks and mages doing their thing in dungeons which at times makes me feel a bit lost. Except for setting traps and killing mobs getting too close to the mage, how would you like your hunter to act in these groups?

I'm not too used to these and would like to be a player people want to regroup with.