How to play high tier LTs at mountain pass?

[CAPIRAGE 0]

The tittle says it all, I can't make my tier 7-8 LTs to work in that map whenever I play tier 9-10 games... I think it may well be a corridor issue, but maybe there is something I still don't know about this map

Any advice will be welcome.

Thanks in advance.

[AirG 1,089]

Basically, find your firing lanes, tune them, and support your team with as much lighting/fire support as possible. 
I like doing the bridge boosts to achieve this.