jokersJokers never sit in pairs, singles, or NEWS. If your last gap is a pair, your jokers are spectators; plan the wait accordingly.
jokersA quint with one joker needs all four naturals of the tile. Only four exist. Walk away.
callsThe call window closes when the next player racks their draw. Hesitate past it and the moment is legally gone.
callsPriority follows the seating, but a mahjong claim beats any exposure claim, even one mid-expose. Know your rights before you argue.
callsYour first exposure narrows your hand to a handful of lines. Make it when the tile is worth the information you hand over.