@I'm a Teapot! Sounds like a fun game for you (not your unfortunate opponent)! Yes, I'm thinking of using Summoning Dora like how I use Melee Dora, as a solo or small unit. Her ability to reliably summon within her own activation makes this viable. Other support models are a bit more challenging as they have difficulty keeping up with Pandora, but you can consider a Reporter since her actions are all against Wp and she can put out conditions.
@Xaos You might have underestimated Pandora a bit. She kills faster than it appears, especially with Sorrows around. Incite and her attacks are against Wp, so they do ping Misery. Even a weak damage track on a chaff model of say 2 dmg min gets +1 for Pandora's Misery and +1 for each other Sorrow. That's a min damage of 4 if you have just one Sorrow around, pretty respectable output there.