It hasn’t been an easy run to Friday night’s Class A North championship game for the top-ranked Hampden Academy boys basketball team. First was a 57-54 escape of No. 8 Mt. Blue of Farmington, then came Wednesday night’s 54-52 semifinal survival of No. 5 Brewer. Dominance? Not yet, but it’s the bottom line that counts for the 19-1 Broncos. “We’re playing on Friday for a Northern Maine championship,” Hampden coach Russ Bartlett said.