3000 Point Grey Knights, first timer list

Okay so i recently decided to start a Grey Knight army, and in doing so i just decided to jump right in and go straight to 3000 points straight up, heres what I\'ve got

Grandmaster

Castellan Crowe

5 Paladins
1 Psy Cannon

10 Purifiers
Psybolt Ammunition
2 Halberds
2 Flacions
1 Daemon Hammer

10 Purifiers
Psybolt Ammunition
2 Halberds
2 Flacions
1 Daemon Hammer

10 Purifiers
Psybolt Ammuntion
2 Halberds
2 Flacions
1 Daemon Hammer

5 Purgators
4 Psycannons

Dreadknight
Heavy Psycannon

Dreadknight
Heavy Incinerator

Stormraven
Psybolt Ammuniton

Stormraven
Psybolt Ammunition

Stormraven
Psybolt Ammuntion

Any hints or tips would be greatly appreciated, and any handy little tricks would be great, im still yet to have a game with them

Are you playing Apocalypse? Perhaps an obvious question but still. My experience with those types of games is, doesn't matter what you bring, they'll be dead in a second, sooo my advice is just take whatever you like and have fun!

No its not just for apocalypse, this will be my 'everyday' army, 3000pts is typically the points value me and my friends play

Give the gm orbital strike relay. At these points you will have either mass armor or mass infantry and the relay will give you tools to deal with either