Well recently my planet was scanned by a member of this legion and he failed invasion with no attack or defense glad about that.
Its a Tiny Exotic 5x Mining, 6x Research and Artifact making 144 off of it not even full yet.
But I have a good terra I would like to invade and flux. So point is should I use it on the exotic or the terra?

with the abilities of taltherians and mylarai, the only reason to even consider keeping a tiny exotic would be the research... though you could probably still do better with something else...

go for stuff that's no smaller than a large

I do but the resources on it brought me too it, I will be using expanders on it as well. But remember thar Kronyn might add research to it hopefully.

Oh also he pacified himself for 12 hours.

yeah i keep praying.... it'll be the only reason i don't switch to taltherian first

Use it on the exotic i recommend, i'm assuming the terra has enough space to fit some defence structures.

I just got attacked on a Large Ex Rich Arti Icy, and they conquered but I conquered back easily. So im using on exotic and using the Mini Flux on the Icy and a Flux on the terra, I will have 2 Fluxes left over to save.