A Failed Tournament List

So today I played in an 1850 tournament in Cleveland. I just moved to the area and though it would be a great chance to meet some new people. The list I wrote is like a sprinter, great in the short term (turns 1 and 2) and then fades fast.

I scored first blood and slay the warlord in all three games, but in the first two, they were my only points, as I couldn't hold objectives and got all but tables (1 Leman Russ left in the first two games). The third game I tabled my opponent turn 4. There was no terrain on any of the tables and we played The Relic, then a mission with 4 objectives, then one with 6 objectives and Maelstorm rules.

I like the idea, have never used a LoW before, and don't think I'm going to sink points into one again.

Lord Commissar
Vets- 1 Plasma, Chimera
Vets- 1 Plasma, Chimera
Vets, 2 Flamers, Chimera
LoW- Stormsword
Emperor's Fist Company
Enginseer with 1 servitor
Pask Punisher 3 heavy bolters
Exterminator with lascannon
Executioner with heavy bolter
Demolisher with heavy bolter
Punisher with heavy bolter

Usually I take 2 vendettas, putting a PCS and a special weapon team with flamers in them for linebreaker and late objective takers.

Other than dropping the LoW, how can I improve my list? I think it has potential.

Thanks!