Outsider FE

[Knight Of Pentacles]

Collect fleshtrophies from PC tieflings, aasimar, and genasi.

[Valo56]

I'd say only from Tieflings and Aasimar, and perhaps Planar Bound Sorcerers. Leave Genasi flesh trophies for Elemental FE. Great idea, though, in my opinion. :)

[putrid_plum]

I don't believe they are outsiders by d&d standards but I could be mistaken

[Dredi]

I believe they are considered "Medium Outsider (Native)"

So infact, by all means - a Aasimar/Teifling/Fey'ri, etc would be susceptible to spells like planar binding (secondary paralysis effect)