With the 5 already signed plus Starkey that leavess 6.21 and looking at last year's end averages (here) that means the possible following riders (excluding ones who already have a club obviously): Tom Brown 6.20 (he's retired though, hasn't he?), Luke Priest 6.08, Ricky Wallace 6.00 (unlikely), Ricky Scarboro ( ), Dan Halsey 5.56 (surely no seeing as he only stated on here about a week ago asking for a team place, however a snip of an average), Gary Beaton 5.52 ( ) and Richard Franklin 5.39.
Priest looks the best of that lot, at Smallbrook last year he got 9+1 from 4 for Mildenhall & 9+1 from 6 for Newport.