Hastings and Bexhill have clinched second place in Sussex One but they expect to have to travel for their promotion play-off.
They saw off Pulborough 50-10, helped by a hat-trick of tries by Dave Milham.
Martin Sheppard, Tony Roche, Ben Campbell, Craig Burgess and David Northen also crossed with Neil Redman adding five conversions.
Nineteen-year-old flanker Roger Roberts stood out in an impressive display by the H&B pack.
Seaford's promotion bid ended with a 10-3 defeat at UC Chichester, though Simon Baker did give them a half-time lead with a penalty.
Crowborough defeated Rye 21-7.
Otto Carlisle scored five tries as Horsham enjoyed a 63-0 home win over Hellingly.
The Welsh winger has come through the ranks at Coolhurst and was the star of the show as Horsham wore down their visitors.
Matt Stone (2), Rob Wright, Rob Plinston and Tom Wright also got over.
Skipper Guy Hannell is fairly satisfied with his team's season even though they have failed to stage a serious bid for promotion.
He said: "We can't be too downbeat about our league position."
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