Under 2.5 goals
Casa Pia went three times over and 11 times under 2.5 goals with 2.1 goals per game. Arouca went six times over and eight times under this line with 2.2 per game. These teams are combined for 2.18 goals per game and I do not think we will see more than one or two goals max.
Casa Pia are the best team in the league for this bet, with 79% of their games finishing with under 2.5 goals! At home, they are doing a fine job as they are undefeated in the last six matches and have scored one or zero goals in four of those six matches. Additionally, defensively, they are doing a fine job with two clean sheets in the last four games, and considering they will now face one of the worst offensive teams, I wouldn't be surprised with another one.
Arouca, on the other hand, are aboslutely terrible offensively. They scored only eight goals in 14 rounds, with only Farense scoring fewer (seven goals). And in recent games, it seems they are only getting worse as they scored only three goals in the last five matches - 0.6 per game. They have scored one or zero goals in the last seven matches in all competitions.
Max stake 10 on under 2.5 goals at 1.67 odds.