This cube attempts to emulate some of the classic modern decks. There are 3 large archetypes (can potentially support 2 or 3 drafters in a pod) and 5 smaller archetypes (can generally support a single drafter). Each archetype has a couple of representative modern decks that can be constructed in the archetype, but generally will need to branch out to make a full draft deck.

Big Archetypes (60 cards each):
Tron (Green, Blue, Eldrazi)
Jund (Ponza, The Rock, Shadow)
Affinity (8cast, stoneblade, hammer)

Small Archetypes (36 cards each):
Spells (burn, prowess, storm)
Lands (scapeshift, titan, saga)
Control (various 5 color support)
Graveyards (Dredge, Living End, Reanimator)
Tribes (Changelings and lords)