I actually prefer to use melee characters against her, basically circle-strafing her from phase to phase. Whenever she gets her Shield up, I just keep moving around the Arena, killing Thralls and Pylons.
Once enough ‘safe space’ exists, I get back at her.
I usually do the Ops solo, though. In a team, this might not be so easy to pull off because kiting her gets harder with more players to pull aggro from her.
And for ranged characters, I agree with what @timtoborne and @Whitethroat said.
Try keeping Walls/Columns between you and Aria and attack her in partisan style:
- Always keep moving - repositioning is crucial to survival.
- Attack on good opportunities - don’t try to brute-force it.
- Never let too many thralls alive - if you get cornered by her adds, it’s over. (I focus Evolved over Gunners)
I usually ignore her Shield Pylons, because destroying them within a timeframe that actually yields some benefit is nearly impossible solo. Might be different with a full team.
But the most important part about those is, that destroying them would put me out of my way, leading to bad positioning and probably getting swarmed by Thralls.
Also, I usually try to limit pickups to strategic use (e.g. planning escape routes along ways where there are still loot objects). Destroying 1-3 Boxes (or opening chests) is likely to get you Overshield+Speed Boost. Comes in really handy in those WTF moments.