It's completely unbalanced. I can easily destroy five out of six of your pokemon with an
ice/water type pokemon such as lapras or walrein.

I would keep tyranitar,garchomp,charizard,metagross,i would get something like reunclus
and beartic i think that would be an awesome team

If you have t-tar,you need that reuiniclus. Magic guard+life orb in a sandstorm~go figure.
You'll stall kill stuff easily. Get rid of salamence,hydreigon. They don't benefit from a
sandstorm.

I think there is only one pokemon in that team worth having and that would be hydreigon (i
have a level 70 hydreigon that knows:

Dragon rush
Flamethrower
Thunderbolt
Dragon pulse

Way too many dragon types a trainer with a lapras would destroy you. 1 dragon type also
you need a fighting type like a high level thro one electric type too. Balance stuff out!