Newbie....Damaging Vehicles

Hi I'm trying to understand the vehicle shooting rules,particularly to gauge how Drukhari weapons rate against other factions.What do the Drukhari have that can damage T7+ vehicles?

Why does the Dark lance only have a D3+3 damage and what toughness at best can it damage?

Any darklight weapon is good against vehicles. (Blast Pistol, Blaster, Dark Lance, Dark Scythe or Void Lance.)
Heat Lances are also good.

All of the above are Str 8.

You can also get some decent wounds out of a decent sized Warrior squad, Scourge Squad, or Venom under the effects of Potent Metallotoxins.

And......only D3+3?! Thats pretty damn good compared to other weapons!

Yeah, D3+3 is pretty much the nec plus ultra, barring titan weapons and a few exceptions (and the tau railgun that's coming)