Taking down Grey Knights

So i need some advice how do i take down Grey Knights?
Dreadnoughts with autocannons are my biggest pain also his razor backs with heavy bolters
Advice?

So he's doing a Coteaz henchmen + dread list? I suppose the top three things to say would be:
1) Make good use of cover and make sure there is enough cover on the board to block his firing lines.
2) Failing that going first will help, both in getting you closer and in killing his stuff before he can shoot. Baron can help you go first.
3) Saturation. Make sure you've got enough targets (Raiders, Ravagers, Venoms) so that you've got more then he can shoot down.

If he does only have henchmen then his core will be really weak. Once you pop his dreads/razorbacks he won't have much left that can fight you well. Wyches will likely take down most things he can throw at you (and they are good vs vehicles too).

I'd probably go with alot of small wych squads with haywire grenades in raiders. next up ravagers, then blasterborn and whichever fast attack you like, they all work. As I said above, Baron would be my preferred HQ.

Night shields. They wreck a grey knights day and combined with premeasuring you can keep yourself away from his range. Wreck the dreads with lance fire (now very achievable) and your set!

Massaen wrote:

Night shields. They wreck a grey knights day and combined with premeasuring you can keep yourself away from his range. Wreck the dreads with lance fire (now very achievable) and your set!

Night Shields certainly help against the majority of GK firepower but Psyfleman don't care about them, with their 48", 4 twin-linked S8 shots.

There's plenty of useful information in this thread Versus Grey Knights?.

Hope that helps.