Try this nodes in conf file. They are working for me.

addnode=www.cryptounited.io
addnode=74.208.133.18
addnode=82.176.15.155
addnode=66.66.243.140
addnode=223.134.231.97
addnode=46.4.64.68
addnode=72.209.45.11
addnode=85.236.188.28
addnode=121.75.108.168

Also i suggest for you to keep a separate copy of database, metachain, txleveldb folders and .lock, blk0001.dat files. (wallet.dat is a good idea to keep too)
That way when if wallet crashes, you use those files i wrote before, instead of sync from 0. 

Griffith will get us a better wallet in a few days, i believe