There are 5 minutes left. You're going to KO your opponent's Pokemon this turn, putting you ahead on prizes. Can you take up those entire 5 minutes doing lively legal actions?
IMO, a 5-minute turn seems excessive. If, up until that time, turns have averged 1-2 minutes per turn, game tempo has changed. Those are the kind of judgement calls a good judge must make. Game-time-equity is described in the Game Tempo section of the Penalty Guidelines. Can a judge penalize you for taking an unfair share of the game-time, even if you're making lively, legal actions? Yes. Will they? Who knows.
YES
Play a supportor - YES (regardless of the game effect, thinning the deck is an effect)
Play a Trainers, Night Maintence - YES
Play a NRG - Yes
Use the Claydols - YES
Using any Power - YES
NO
Doing "other than" prompt shuffles - No
Late Game Elongated Searches - No (Early in the game, searches can take a while, we inventory deck, we decide our game plans etc, at the end, they don't, the deck is thin, the prizes are known, a late game long search is just reasons for a direct caution.)
Stalling tactics Of - Needlessly searching discard piles, Cards in Hand questions, etc. These game state inquires are obvious stalling tactics.
The philosphy should be that the player should be allowed to do any action that would be done if the game was untimed. The pace of the actions can be judged. Judges should not judge if those actions are proper. I say these things as a player. If a player is up 5 prizes to 4 prizes, they should be allowed to do actions on their turn as though the game is untimed. Many players are on the up and up, and would not stall for a victory. But we should not be disallowed from doing game actions because there is less than 5 minutes and WE ARE AHEAD. The comment that says, well, I didn't disallow, but I didn't understand why those actions were taken, thus I will extend the game, and that is not a penalty.... That logic doesn't hold. (If a player is judge to be performing game actions slow, then I don't disagree with the judges ability to extend the match.)
This season, In the deck that I currently play, I will often late in the game promptly play a Roseanne's for NO effect. My reason that the Judge might not know is that I am looking to deck thin and Claydol cycle into a non searchable energies, reversals, or Palmers. Now if a judge "thinks" that that move didn't impact "the next turn", but we should be allowed to play as though we will have a turn after this. Thus I should be allowed to play my turns to set up my plays for the remaining of the game, even if the clock might say that it won't happen. Judges should not say well it's not a penalty to extend the game, it isn't there place to put themselves into the game.
In a top cut match this year, I won game 1, 6-5. Game 2 we had about 15 minutes, I was playing against a Gyrados deck and mid game I (1-1 in prizes) Tranpinch lock my opponent Regice for the last 4 turns of the game. I don't know how much time it took, but my strategic view was that I didn't need to get into a boxing match with him, he had 3 more scoop ups in his deck , but I would take my chances on him finding them and flipping heads. He had hoped that I would get into a boxing match with him so he could get to the 4 prizes. I played promptly, I did all moves available to me that I would do to, I built counter attacks on the bench, but I choose to use the lock to get the round victory, at the end of the game, he said he was fine with what I did. I didn't feel any guilt, because he could have found a SSU and a heads, and started a boxing match. He had at least 4 turns to find his outs, he couldn't. The strategy was to stall for the victory, but it was game actions that did this, not me slowing my pace of play in any way.