Your job first and foremost is to deal damage to grab attention.
3.0 has made everyone who's overleveled/overgear stronger in lower level content, further worsening the gap in power between you who is likely to be the appropriate level and typically geared in normal quality whites and pinks compared to those 50 levels higher in all blues.

Go Strength. Make sure you can hold threat. You cannot use your defenses if you're being ignored.