A Extremity

Usually starts around T Spawn, Fountain, Playground, Party, Bathrooms, Long or late Connector support routes depending on spawn and the default. Can change responsibilities with the Connector playmaker, B extremity or AWPer between rounds, especially when the team wants to pressure A control, punish CT aggression or hold rotations while B pressure develops. This player keeps the A side of Overpass dangerous even when the final hit is not A.

Pathings and possibilities from starting Fountain / Party

Fight toward Bathrooms or Long with teammate utility to deny CT map control. (Aggressive)
Hold passive anti-push angles against Fountain, Party or Connector aggression. (Defensive)
Reconnect with Connector, Long or B pressure according to CT reactions. (Situational)

Pathings and possibilities from starting Bathrooms / Long

Establish forward A control to threaten late site hits
Use utility to force the A Anchor and AWPer off comfortable angles
Delay presence to punish rotations after Connector or B pressure pulls attention away

Mid-round patterns

Build A control through Bathrooms and Long while keeping the defense uncertain about the final finish. It works when the T side wants to drain CT utility before committing.
Hold A extremity control while teammates pressure Connector or B. This can trap rotations, protect flanks and keep the A defenders from helping elsewhere. It appears in slow defaults and fake-heavy rounds.
Convert late A control into a split or plant attempt when CTs over-rotate. The hard decision is reading whether A is thin enough to hit or whether the pressure should simply keep defenders locked in place.