The other Doc trying to decide who to pick made me have a look at the shop as well. With a selection this large it's probably best to just wait until I get spooked some more and then filling gaps in case it's needed.
My lack of snipers has been filled nicely with this event and the only niche that's somewhat lacking are casters. But I don't think it's that pressing of an issue. And there's the gold cert option too.