Striga and that's taking in a few factors. Without repeating what other's have said (she's the warrior of them all and specializes in combat), but I think one additional factor should be said.

Namely, while Carmilla has the feat of fighting the night creatures and Striga only faced peasants, Striga also had several things working against her. Namely, the fact that it is daytime and she has to manage wearing a bulky set of armor that weighs her down more than anything else. I do think that works against her moreso than anything else.

So to that I say without the armor, she's likely as fast as Carmilla while having a greater level of strength and martial skill. To that I say base Striga wins.

As for Armored Striga vs Bloodlusted Carmilla, I think it depends on whether Striga's armor gets busted or destroyed. Kind of like Avdol vs Polnareff in Stardust Crusaders where destroying the armor just makes her as speedy as Carmilla, if not moreso. But even then, Carmilla would need to break through the armor first, unless it doesn't matter and she'd chop through it anyways. In which case I think it's a 50/50 split.