Here are all the useful numbers.
0 BoS Initial Kick Speed w/ Fleshripper:
7 frame = 68 ias
8 frame = 32 ias
9 frame = 13 ias
0 BoS Follow-up Kick Speed w/ Fleshripper:
3 frame = 16 ias
Right now you look like you're only at 9/3 (only ias I see is 20 from LoH). Shaeling the Fleshripper gets you to 8/3 and you'll need another 28 ias to reach 7/3.
Definitely shael the Fleshripper. You'll probably be able to get away with 8/3 kicks, but you should really shoot for 7/3.