A Bernie Ibini brace helped A-League leaders Central Coast to an emphatic 5-0 win over battling Wellington on Thursday in Gosford.Ibini scored in the 30th and 87th minutes as the Mariners ran riot to move six points clear at the head of the A-League ladder.The in-form Ibini was ably backed up by Daniel McBreen who continued his incredible goal-scoring run, and Central Coast kept their impregnable home record record intact.The Mariners are two wins clear of Melbourne Victory on top of the table and, with a massive goal difference of 22, are looking increasingly difficult to reel in.Ibini's second goal, created by a superb through ball from McBreen, was followed by another from substitute Mitchell Duke on a memorable night for the home side.McBreen, the league's leading goal-scorer, claimed his 15th of the year in the 69th minute as the Mariners extended their undefeated home record this season to 10 games - nine wins and one draw.In the lead-up to the clash, Mariners' coach Graham Arnold challenged his side to aim for 50 premiership points, as they seek a second straight premiership, and they responded in kind.Ibini's first-half goal was added to by John Hutchinson strike in the 65th minute and a bullet header from the irrepressible McBreen from a corner in the 68th minute.Earlier, Pedj Bojic had missed two golden chances to extend the Mariners' lead. But that mattered little as they decimated the second-last Phoenix who have little to look forward to in the final third of the season - in stark contrast to their conquerers.