3 applications for Jl audio subs crossovers?

I have a JL Audio F113 that I love in my HT room
I use it with an Arcam 350 where the speakers are crossed over using the ht amp

I just bought two F110s from Eric, a nice audiogoner an hour away

I have three options

1)Daisy chain one or both of the F110s to the F113 in my HT

2)Daisy chain one and give my friend who has a 2 channel Plinus integrated with stereo outputs only one sub. His speakers roll off around 60-70.
What crossover would be needed? Passive or active? Any recommendations on something that would merge stereo low end well to the sub? Doesn't have to be mega designed or $$$

3) keep as is in the ht and hook the two f110s in my 2 channel room

Would you cross-over for the two channel split between pre and tube amp to the mainspeakers? Or post amp with some type of passive
I dont want to go the digital route

Leaning towards option 2)