Jonny Goldstone continued his rich vein of form with four goals while Richard Black also netted for Leeds.
The struggling hosts grabbed a consolation via Gabriel Silva, but boss Kristall said: "We are within touching distance now.
"But we are no illusions that we face some tough games before we get over the line.
"Nobody is taking anything for granted.
"You can bet though that every side would want to swap places with us."
Kristall hailed Goldstone, who has now scored 11 goals in four games, and strike partner Black.
He added: "They compliment each other's game. I don't think there is a better front two in our division."
Meanwhile, Adam Lavin's double helped South Manchester heap further misery on rock-bottom Maccabi Manchester Yellow in their 6-3 win.