Can some help me make a deck to push to frozen peak and beyond?

I have all arena 7 and under cards and the only legendaries I have are log, lava hound and sparky. Most commons lvl 8, rares lvl 6 and epics lvl 2-4. I myself am level 8 and no matter what I'll get to where I need one more win to advance and I play the most one sided matches ever and then get put down 100+ trophies. Thanks in advance!