This is my Diamond Cutter deck...well, since my Trash Man deck was very popular I figured I'd post the deck that my Trash Man deck was tested against mainly...

La Ura Giga x4
Emerald Grass x4
Senatine Jade Tree x4
Dia Nork x4
Mist Rias x4
Gran Gure x2
Syforce x2

Larba Geer x2
Ladia Bale x2

Screaming Sunburst x4
Sundrop Armor x4
Diamond Cutter x4
Holy Awe x4
Terror Pit x4

48 cards

Tell me watcha think...

Diamond cutter decks are overrated in my opinion. Bounce decks totally slow them down, fire/darkness creature kill decks make diamond cutter a useless card. Diamond cutter decks are just there to keep rush decks in check. As for your setup, it looks like the standard with terror pit as support. But what does Syforce and Screaming Sunburst? I know it is hard to wait for the new cards to come out, not everyone has information (or the correct information) what the new cards do.

Syforce is a 7 for 7000 blocker who can attack and has double breaker. Screaming Sunburst taps all non-light creatures in the battle zone. These cards came out in the tin thats why I use them.

I believe you should max out Senatine Jade Tree and Screaming Sunburst for more early game advantage, everything else looks good to me.

Update...took Tetirs advice...I think 48 isn't a big deal with Mist Rias.