Feed LFE to all the LFE Inputs of the Triton One and Three towers. It would be like having 4 subwoofers around the room. It is all good IMO.
Of course, as Walter says, 4 subs are better if it is feasible.
I will have 5 RBH SX-T2/R towers in my HT room. But each tower actually has a true SX-1010 subwoofer. So 5 towers in my case = 5 SX-1010 subwoofers.
If you don't feed LFE/Sub signal to the built-in subs of the Trion towers, then it is a waste.