Ouch... I have to say, Molly-Datsue Ba is quite a solid 1-2 punch. Interesting, very interesting.
The only model I have summoned with Horror Molly is Punk Zombies and Drowned. The latter is great if you want markers and they can survive a big hit as long as they have 2 wounds (you will need min damage 3 against them). Punk Zombies are great for two things, killing stuff and tying things up thanks to having Hard to Kill. The latter can Spirit Molly also do, but with the humble Night Terror instead. Since all of Molly's summons comes with Slow, the Punk Zombies need to survive to the next turn (or by Reactivate) to really shine, so they are ok but not great. With all the potential paralyze in a Molly crew, Gakis is quite scary too.