After a midweek setback at Talysarn, Blaenau returned to winning ways at Cae Clyd.
Guaranteed fourth place in their first season back at Tier 4 level, the Quarrymen;s goals came via captain Jack Diamond, 16-year-old prospect Caleb Wynn, who netted his first for the senior side, and Sion Woolway.
Ceri Roberts provided two assists and Joe Dukes-Morgan one.
Leon Buckland replied for Llandegai with a first half equaliser.
Dion Owen’s 58th minute strike clinched maximum points for Llanberis at Cae Ty Cristion, where the Boded goal machine was becalmed.
Captain Tom Wood plundered a hat-trick for Cemaes to make it 21 goals for the season – and he added two assists at Cae Stanley.
Matt Reynolds, Shay Murphy, Callum Queen, Ben Amos and Luke McGivern added one apiece for Bay, who ended their league campaign on a major high note.
Reece Evans was a hat-trick hero for Penrhyndeudraeth, with Alun Hughes delivering a double, while Callum Jones and Gwion Davies claimed a single apiece.
A week after these sides shared a seven-goal thriller in the Cwpan Menai Tractors final, which Holyhead won 4-3, neither team managed to break the deadlock in a league clash at Cae Gors seven days later.
Town had already clinched fourth place, while Rangers can grab fifth spot if they win their final game against Caernarfon Borough at home on May 20.
Crozzy finished off their debut season in Division One by edging a seven-goal cracker at Cae Ffwt.
Goals from Joe Davies and Lee Fallas put the hosts two-up before Dougie Lonsdale and Jamie Williams hit back for Wanderers to make it 2-2 at the break.
In the second period, Aidan McBride netted on 64 and 74 minutes to make it 15 goals in 17 league games this season for Crozzy.
Captain Lonsdale pulled one back for the visitors after 76, but it was not enough to save them from defeat.
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