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!

Need help please asap please!!!!

I flashed a backup from twrp recovery then it was successful but when I rebooted my device it was stuck on an endless boot. I was able to get to twrp recovery then i bootedinto the bootloader I dont know why but i relocked the bootloader using oem lock. then it booted up and now is stock on the htc logo. i thought it would boot up then i was going to unlock the bootloader again thinking it would fix it. i was not thinking straight. now my phone is not being picked by my pc when using adb devices. please help

please
thank you