[rickbb]

Combining 2 identical antennas is almost impossible. In your case not necessary.

If you want a bow tie style antenna you can remove the reflector and receive channels from both front and back quite well. The reflectors are added to extend the range for people in a fringe reception area.

You do have 3 VHF stations that will need either a separate antenna or a single antenna with VHF and UHF elements.

Start without an amp, you have enough close stations that they will overload the amp and make things worse rather than better. Unless you are going to split the signal to 4 or 5 TV's and have cable runs for many hundreds of feet I doubt you will need one.

Connect just one TV with as short a cable as possible first to tune the aiming of the antenna, then add from there and see what you lose. (I actually get on the roof with a small TV to do this.) You can start with the antenna you have, might just do what you want.