Is there anyone mining in solo with rx480 cards? What clocks do you set and what hashrate do you get?

And another question is: WHY for the God's sake many of crypto wallets has difficulties with blockchain synchronization? Is this so hard to make it just like in Litecoin Core wallet, or DASH, or Argentum, or as in many other wallets where successfull synchronization is just a matter of time?

I downloaded Nexus 2.5.0 x64 Qt wallet for windows and the blockchain. The wallet successfully accepted the blockchain but stuck at block 2203099. How to force it to sync at 100%?