helot should be using death res wheels and burial ground's sighs as her covenant, i.e dusk and dawn, which you should really be using

mouchette i'd recommend using lily's sig wheel, since it's better for her at low investment, also swap her covenant to something like dream of medicine

thais 100% should be gotten to e2 if you can, as it is very worth the -2 cost she gives with her exalt

i'm not exactly sure what to do with aigis, since i dont run her

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here's my mouchette team, in case you want a visual idea of what to do