Recommend Do Not connect 2 seperate antennas together with a reversed splitter.
Yes you can try it , however the reception resluts will not be good.
Reason , antenna cross talk.
The signal strengths at your location are strong signal strengths with LOS=Line Of Sight reception.
Recommend install a ANT751 antenna aimed at about , 141 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
____________________________________
A antenna system amplifier will most likely not be required.
____________________________________
For 1 Tv connected use No splitter.
For 2 Tv's connected use a simple common 2 way splitter.
For 3 Tv's connected use a simple common 3 way splitter.
__________________________________________
Install the ANT751 antenna above the Peak OF The Roof in such a manner that the roof and house are not blocking reception to the , North , North East , East , South East , South , South west.
As always , trees and tree leaves , plants and plant leaves , have a Negative effect on Broadcast Tv reception and so do buildings including your own roof and house and other obstructions.
The Best Practice is to install the antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception including your own roof and house.
___________________________________________
As a Test to prove reception.
Run a NEW Continues length of coax from the matching transformer at the antenna , through a open door or window , Direct to 1 Tv.
Bypassing all couplers , spliters , and other devices.
___________________________________________
Digital Tuners can develop -Digital Glitches- that are not cleard out with simple channel scans.
Do Double Rescan ,
http://www.dtv.gov/rescan.html.