How's this list?

Castellan and the first command squad will pair up with the 20 man blob, other two will go with their own melta squads. I'll be prioritizing the First Rank Fire and Take Aim orders. I'll play super aggressive with the Dorn and charge scouts through no mans land as taking down this armor is gonna be super tough in a 1000pt game. I'll bring back one of the sentinel units with reinforcements and use my cadians to make objectives sticky. I know command squads aren't the most comp unit available but I like their perks and I don't know if taking a Dorn to a 1000pt game is a dick move or not so I don't wanna be too meta.