After a cue or RJO is doubled, pass is to play. Redouble is primarily for blood. These bids still apply by passed hands, although the 2NT bid is very rare, showing freak distribution, typically 7-5 or so. Doubles by advancer are card-showing, hands with no clear direction. Red on white, 7-loser hands are uncommon.
Raises are somewhat invitational.
White on red, however, all bids have been known to be stretched a little. When the choice is between a two-suited bid and a power double, more factors enter into the choice. With 5431 hands, strongly tend to pick the two-suited action. With 5422, judge by honor location. If the two short suits are strong and there's a double stop in their suit, it's likely to be right to make a power double.