Which tip is recommended for a Moerman Combinator 2.0

You will want to select the Tapered Tip for your tools. This will fit via a pressure fit. 

Which pole tip would I use with the Ettore Complete Pro+ Microfiber Stripwasher 22"?

Hello! Any of the following will be suitable for the Ettore Complete Pro+ stripwasher:

Maykker Swivel 
Ettore Taper
Ettore Pro+ Fixed
Ettore ProGrip
Ettore Pro+ Super System
Moerman Ergonomic
Moerman Swivel
Moerman Combinator 2.0
Pulex Technolite Red
Pulex Technolite Green
Pulex Swivel
Sorbo Swivel
Unger ErgoTec Ninja
Unger ErgoTec
Unger SwivelStrip

Which pole should I buy to use it with Ettore satinlesssteel backflip squeegee?? Also what accessory to best mop floor with the same pole? Thank you.

Unfortunately, the Ettore Backflip will not work on the utility pole but, does fit on the Ettore REA-C-H extensions poles (https://windowcleaner.com/ettore-rea-c-h-extension-pole). You can also use the Ettore Microfiber Mop with it as well (https://windowcleaner.com/ettore-microfiber-mop).

I will use the 60" Ettore Utility Pole. Which is the best end to attach pole to Ettore Complete Aluminum Squeegee, TAPERED end or THREADED end

You will want the Tapered Tip for the Ettore Complete Aluminum Squeegee.