is anything wrong in mix?

I think the mix is pretty good, and I like the song. It reminds me of Helloween. The vocal side samples work well, although I have absolutely no idea what they're saying. Of course, I have no idea what the vocalist is saying either.

The rhythm guitars are pretty plastic-sounding, but a lot of power metal bands go for that sound. The lead sound is great and mixes well with the rhythm. The lead vocals...I'm not sure what to say here... Vocals that are actually spoken in (is it Norwegian?) as opposed to sung/shrieked/growled in English are going to sound completely different than anything I'm used to, so it's hard to put a finger on it... But somehow the vocals just don't quite fit. The rest of the song is quite melodic and the vocals are thin and rough - it just doesn't work for me.

Overall, I'd say you've got a solid power metal song here and the mix works, but maybe consider changing the vocals :)
 
1st of all - about vocalz. I 4got 2 say:
ALL vocals & speechez r in RUSSIAN !!!
Thus you probably COULDN'T understand it @ all! ( The probability that you can speak russian is a little %) )
Main vocal also DID NOT sing - it wasn't planned 2 make vocal line of notez - but growl instead. But growling was also rejected - 'cause i found impossible 2 make text understandable @ THIS TEMPO!!! :) I had recorded 4(FOUR!) growl-vocalistz but nobody of them can articulate words of text @ this tempo so that it can be understandable for people, previously didnt listen this song! :) :) :) So ... i was disappointed but didnt wanna give up the idea. So i recorded another vocalist - from PUNK group instead of true-serious metal !!! :) :) Only after this pervertive change of art toolz i've reached the aim - the text of song became understandable !!! :) :) :)

Left & right guitar was recorded with some different mic to combo positions - so it hard to figure how to compare the loudness of both. Sometimez i think left guitar louder, sometimez - rite )).
For plastic sound - is this about absence of sound @ freqz more than 10 khz ? Or what did u mean?
On limiting: i limited this just to reach standard level RMS -9dB. Not more. I ve been tuning limiter release, attack(more xactly - in my limiter there is look-ahead or "pre-tune" instead of attack) and treshold tp get sound @ needed RMS while not unpleasantly distorted. So - if somewho can advise limiter that can do this task better (or does it quite well on your earz) - please tell me !!!
 
Ah, Russian. That was my next guess :)

Honestly, no one can understand the vocals in most metal anyway hehe. Give your Russian listeners a lyric sheet and don't worry about the lazy English and Americans who won't take the time to learn Russian! Go with the metal singer.