Should I trade transducer?

Question: What transducer setup would be most efficient and should I trade one of my new transducers for something else? I have a used 858C HD DI with two transom type transducers one that came with it and another just like it with a trolling motor bracket. I also have a new Hellix 10 chirp mega si gps g2n and a new Helix 7 DI GPS G2N chirp along with 5 port switch and cables. Also will network Terrova I-Pilot Link. Do have US2 cable for humminbird but probably won’t use. 858 goes on bow, 10 on consol and 7 to stern by kicker. Opinions appreciated.

If you are mounting it to bow dont use the US2 as you will loose down imaging.

I have helix 7 di at bow, i mounted the di ducer it came with using hose clamp. No issues, but i can see how buyiny the TM DI ducer is less prone to snag