I dont see Entropy beating quietus (Guillotine never did despite some claims) even with an INT build and belt/gorget
My rather weak sets, same 133 damage weapon:
138 STR, 70 MND.
133+14+8+46+23 = 224 base damage, 3.0 fTP (3.3-4.5 if you really wanna consider attack bonus)
Entropy with Soil/Soil
94 INT (seriously, only +9 INT. I gotta find some new junk...) 5/5
133+14+8+79 = 234 base damage, 3.8-4.55 fTP
So even with a penalty to fSTR from not being in a full STR set, Entropy will still match in base damage with a superior fTP.
If I had Twilight pieces, they would benefit Entropy more, 4+4<10.