I may be just throwing ideas out in the dark but let's brew some jank. Right now, the main prison-aggro decks are shops and eldrazi. I feel like soldiers, with first strike, can be a formidable tribe. I brewed a first draft and it seems ok. I'm currently trying to tune it and the SB is a mess but I figured i'd share. The goal is to use Preeminent Captain to cheat out fatties. Backup plan is fast mana + Daru Warchief to power out undercosted fatties as well.
Currently considering Field Marshal over Captain of the Watch, and trying to find space for Ballyrush Banneret.
Creatures: 24
4 Thalia, Guardian of Thraben
3 Thalia, Heretic Cathar
4 Preeminent Captain
4 Enlistment Officer
1 Brimaz, King of Oreskos
4 Daru Warchief
4 Captain of the Watch
Artifacts: 12
1 Black Lotus
1 Mox Emerald
1 Mox Jet
1 Mox Pearl
1 Mox Ruby
1 Mox Sapphire
1 Lotus Petal
1 Mana Crypt
4 Thorn of Amethyst
Lands: 24
4 Cavern of Souls
4 Wasteland
1 Strip Mine
4 Ancient Tomb
9 Plains
2 Karakas
Sideboard: 15
SB: 3 Stony Silence
SB: 3 Rest in Peace
SB: 2 Kataki, War's Wage
SB: 2 Eidolon of Rhetoric
SB: 3 Containment Priest
SB: 1 Umezawa's Jitte
SB: 1 Aegis of the Gods