Tips for Knight Lancer usage?

I'm running a Knight Lancer as a free blade, and I'm super keen for tips on how to use it.

Do you just Distraction Carnifex it into the most expensive stuff you can see, try to shred anything with >8 wounds and watch it die 2 turns in? Play tactical behind cover and use it to counterpunch? Is there even enough cover on normal tournament boards to hide a Lancer?

Please help a poor new player!