The deepest tier turns the small blind into a counter-puncher: tight entry, nut-heavy range, patience as a weapon.
3-betting is nearly reserved for the top of the deck. Position and nut potential dictate everything else; offsuit broadways are mostly gone.
The button opens into the blinds nearly half the time. The small blind's answer is an aggressive, 3-bet-first defense — flatting here plays a guessing game out of position against the widest range in poker.
Assumes a ~4bb open; 3-bet to ~3x the open in position, ~4x from the blinds — larger as stacks deepen.