Need help completing team

[hydradestiny]

Im making yet another team, and ive tried using various pokemon to complete it but im only sure about a few of them.

Im sure about:
Skarmory
Blissey
Tyranitar
Garchomp
(?)
(?)

So.. can anybody reccomend which 2 guys would make this team complete and balanced.

 

[BoRn-2-B-eViL]

You don't have any special sweeper.
Maybe a Poryzon-Z and Gengar ?

 

[Sir Aaron]

This is my Battle Frontier butt kicking team:

Meganium
Lvl:77
Typhlosion
Lvl:77
Feraligatr
Lvl:77