Monoflow tee and Pex

I am putting a heat zone to a Bath,Bedroom and another small room all on a second story. My circulator is in the basement. All will be 3/4" finned baseboard heaters of appropriate length for heat loss calculation.This will be a one pipe system. My ? is do I need the Monoflow tee at each end of the baseboard run or just the end of each run. Also if I use the 3/4"x3/4"x1/2 tee and put the 1/2" outlet of the tee to feed the 3/4" baseboard heaters , WILL it WORK Properly?

No...................Stay away from monoflow systems with or without pex.

So then what is the best way to feed three different areas with one circulator?

loop.......