When Fernando Tatis Jr. returns from wrist surgery, he better be something special. He better be an offensive savior, a run-producing fuse and lineup complicator who pretzels opposing pitchers. If not? Well, that becomes a far more alarming question for the Padres than anyone predicted at the start of 2022. The offense found new ways to vex and perplex Tuesday in a 6-2 loss to the sub-.500 Mariners at Petco Park. The offensive slog fueling five losses in six games and eight in the last 10, raises the stakes related to Tatis. “We’ve been looking forward to that for a while, but we know that tha…