My version: fast moving melee opponents with low life to compensate for their speed and vicious slicing abilities.
Still the drell and quarians to go. Might skip the Vorcha, they already look freaky enough.
So I changed the top of the design to look slightly more religious, in ME3 the Kasumi mission had the Hanar diplomat siding with the reapers due to it's belief that the enkindlers (protheans) would have wanted it. Or maybe it was just indoctrinated, I'm not toally sure but I was trying to show that the reapers would convert the Hanar through religious fanaticism.