Please Advise on which is the best firmware ASAP

Hey guys!

I have a Galaxy Grand Prime G530H(Dual Sim). XCU baseband

I really need advise fast on which region received the updates fastest

I don't want to flash the Russian firmware as there are no final lollipop builds for Russia yet.

So my options are Caucasus, Kazakhstan and Uzbekistan.
Which would be the best firmware to flash among the three?
Please I need an answer as soon as possible

Thank you!