The best success I've had with Vanguard Veterans so far is having 3 units of 7-8 Veterans in the 1st Company Task Force (Raven Guard
CT). Just telling you this so you know why I chose the loadout I did. they would usually start in cover with a 2+ Cover save. Since I had 3 units I would usually use two separate loadouts so I could be a bit more tailored to the task.
Veteran Sergeant - Jump Pack(3), Relic Blade(15), Stormshield(10) Meltabomb(5)
Veteran - Jump Pack(3), Stormshield(10) Power Axe(5)
Veteran - Jump Pack(3), Stormshield(10) Power Axe(5)
Veteran - Jump Pack(3), Power Fist(15), Lightning Claw(5)
Veteran - Jump Pack(3)
Veteran - Jump Pack(3)
Veteran - Jump Pack(3)
Veteran Sergeant - Jump Pack(3), Stormshield(10), Thunder Hammer(15),
Veteran - Jump Pack(3), Stormshield(10) Lightning Claw(5)
Veteran - Jump Pack(3), Stormshield(10) Lightning Claw(5)
Veteran - Jump Pack(3), Power Fist(15), Lightning Claw(5)
Veteran - Jump Pack(3)
Veteran - Jump Pack(3)
Veteran - Jump Pack(3)
Switch out the Lightning Claw's with Staffs/Axes to fit your fancy and maybe add another guy with some good weaponry (either another Stormshield/Thunderhammer or a Powerfist/Lighning Claw). I've found that this formula gives me most bang for my buck as it has extra wounds to spend that aren't a point sink and some cheap Stormshield guys to sacrifice. The Sergeant and the Powerfist/Lighning claw do most of the work and can survive 3-4 rounds of combat against some pretty good opponents such as Necron Wraiths (but they will die eventually). For a first turn charge, I'd invest a bit more in equipment, but wouldn't go overboard. Always leave 2-3 guys completely unarmed. Always take 1 Meltabomb just in case you meet AV13+
Maybe something like this?
Veteran Sergeant - Jump Pack(3), Stormshield(10), Thunder Hammer(20)
Veteran - Jump Pack(3), Stormshield(10), Power Maul(5), Meltabombs(5)
Veteran - Jump Pack(3), Stormshield(10), Power Maul(5)
Veteran - Jump Pack(3), Stormshield(10), Power Maul(5)
Veteran - Jump Pack(3), Power Fist(15), Lightning Claw(5)
Veteran - Jump Pack(3), Power Fist(15), Lightning Claw(5)
Veteran - Jump Pack(3)
Veteran - Jump Pack(3)
This unit will cost you 296 pts and is tooled up to multi-charge Light Vehicles, Bunkers,
MC's and Death Stars alike. Because you will find a hodge-podge of units when you come down for that turn 1 charge and will want to pull off some not-so-disordered disordered charges. Should be 12 Str8 attacks at
AP 2/1. Just add another Thunderhammer if you think its a bit weak.
After that I would either go
CAD (white Scars) for a
Dev Centurion/Librarian in Drop Pod. You need that ignores cover. Or else you could add an additional
VV squad and expand on your Tactical Squads/ Scouts. Or you could add a Storm Wing for ignores cover or even a Raptor Wing for good dakka and mobility. 4+ to come in first turn and will come in turn 2, Tank-, and Monster-hunter.