As for the LVX's:
Azelf LVX
A tech in a Psychic deck that requires some weakness help.
Uxie LVX
A lovely tech to get additional drawpower. Also a sudden finisher.
Mespirit LVX
Requires a full deck around him with Azelf LVX and Uxie LVX
Rhyperior LVX
Fullout Rhyperior deck that uses this as a tech. Probably the worst X of the set.
Mewtwo LVX
As a tech/backup attacker in a Psychic deck with the GE Mewtwo for acceleration.
Gliscor LVX
Can boomerang itself whilst inflicting Paralysis, Poison and Burn. Works well as a simple cheap attacker, possibly with Machamp/Lucario/stuff like that.
Magnezone LVX
With some energy acceleration, he's a true beast. Basic combo is with SW Electivire.