Trying to finish my first semi competitive team!(:

[Smayjay14]

Hey I'm new to the forums and I just needed some help with my first semi competitive team. I've played the games since they've been out but I've never gone into competitive gaming. So far this is what I'm thinking, the venasaur and Salamance haven't been bred yet but I'm breeding eevee as we speak.

Charizard flawless IVs
Evs undetermined
*blaze
-outrage/dragon rush
-dragon dance
-flare blitz
-wing attack?
Milotic 5Ivs in hp/attack/sp.att/sp.def/speed
252/sp.att, 252/speed, 4/sp.def
*competitive
-ice beam
-hydro pump
-dragon pulse
-recover
Tyranitar 5IVs everything but speed
252/HP, 252/att, 4/def
*sand stream
-brick break
-stone edge
-earthquake?
-giga impact?
Sylveon 5Ivs all but attack
Not sure about evs yet
*pixilate
-moonblast
-draining kiss
-hyper beam?
-swift?
Venasaur 5IVs in everything but speed
Evs maybe 252/def, 252/sp.def, 4/hp
*overgrow
-toxic
-venoshock
-synethisis
-leaf storm
Salamence probably everything but special attack?
Evs maybe 252/att, 252/speed, 4/hp
*moxie
-dragon dance
-dragon rush
-crunch
-earthquake

What items would be good on that set?
And what natures for the last 2?aha
Thank you all in advance! I really appreciate it! Any and all comments are greatly appreciated!