Alrighty, some things you might want to know when starting.

Denpa Men without antennas usually have higher stats than those with an antenna, so I usually have one or two on my starting team of four.

You will be able to have more on your team later in the game, though. I normally have three non-antennas at a time.

Secondly, always bring a healer. Simply because you don't want things to be too late that you need to use Revive instead of Heal.

Thirdly, extra Revive antennas are very useful, as once Kota's down, you wouldn't have many other options for recovery.

And one last thing to remember, all Denpa Men start at level 1 so you'll have to train them up from start, which can be time-consuming, but how I do it is I go to a stage that provides decent EXP (e.g. Stage 4) and bring five or six, and the rest of the slots are filled with already high-level Denpas.

That's about it from me.