Quick Match Muradin

Level 1 Give 'em the Axe!  

Since there's no support (even if there is), pick  Third Wind  and rotate in and out of combat. If you have the time to play defensively you'll only ever be low when it's time to die.

Level 4

Unless there are enough auto attackers to make you feel uncomfortable, pick  Thunder Burn  over  Reverberation  because it a) looks cooler b) helps in lane when you're the only one getting exp and c) it does damage and they can't kill you if you kill them first

Level 7

Interrupt with  Skullcracker , there's no CC on the team and you might prevent disaster. Use  Give 'em the Axe!  if your team sets you up for it and interrupts aren't needed to keep you alive

Level 10

Haymaker  playmaker. Secure that opening kill or turn the fight around in a tight spot. Every future talent tier improves your chances

Level 13

Healing Static  A big boy needs his beans to stay healthy. You're gonna be engaging with Dwarf Toss  and setting up Haymaker , and this will help you live.

Level 16

Dwarf Launch  to surprise that squishy backline and send it flying. Improves your chances of getting out cleanly (jump away earlier and further away) as well

Level 20

Rewind  Deal more damage, disrupt more, heal more, get more chances to make a big peel and escape afterwards or recover from failed attempts.