Squat 1500 point target list

So with my post below, I made last night a pretty tuned up list, that includes a lot of the things I want to get done for a tournament, namely the chimeras, medusas and hydras.

Here it is:

HQ:

Guildmaster and Hearthguard (Company Command squad) with 3 melta guns, 1 flamer, Chimera: 140 points

TROOPS:

Hearthguard Squad (Platoon Command Squad) 3 melta guns, 1 flamer, Chimera: 120 points

Infantry Squad with Autocannon: 60 points

Infantry Squad with Autocannon: 60 points

Infantry Squad with Autocannon, Commissar with power weapon: 105 points

Thunderer Squad (Heavy Weapon) with 3 Autocannons: 75 points

Pioneer Squad (Veterans) 2 meltas, 1 flamer, Chimera: 150 points

Pioneer Squad (Veterans) 2 meltas, 1 flamer, Chimera: 150 points

Pioneer Squad (Veterans) 2 meltas, 1 flamer, Chimera: 150 points

HEAVY SUPPORT:

Medusa with Siegebreaker: 140 points

Medusa with Siegebreaker: 140 points

Hydra: 75 points

Hydra: 75 points

Comes out to 1440 if my math is correct. Still unsure which of the heavy support slots to squadron up.. will have to playtest to see.