The Mids you don't have, that I believe are a chance to be in the top 8 Mid scorers from here are: JPK, Fyfe, Rocky, SJ, Dal and Barlow. You'll note I don't have Goddard in there, but I freely admit some better judges than me rate him a chance to keep scoring highly.
JPK - in 2012, when he averaged 120, he averaged 12 K's, 16 HB's, 1.1 Goal (0.6 G Ass), 16.7 CP's and had a DE of 68% and TOG 86%. Last season his figures were: average 105, 10 K's, 17 HB's, 0.6 Goal (0.7 G Ass), 16.4 CP's, DE 66%, TOG 85% - so his average fell 15 on the back of 2 less kicks, 0.5 Goal less, and a slightly lower DE %. It really demonstrates how fragile a 115+ average can be! This season his numbers are: average 124, 13 K's, 19 HB's, 0.6 Goals (0.7 G Ass), 18 CP's, DE 65% and TOG 84% - His average has risen 19 on the back of 3 K's, 2 HB's and 1.6 CP's more this season. All maintainable. Definitely a chance to keep going 115+ from here.
Fyfe - played only 79 games, and is averaging 120 this season. Could be the next Pendlebury.
Rocky - his 140+ scores in the last season and a bit came in: 7, 12, 21 point wins, a 26 point loss, and 53 point loss with 35 possessions and 3 goals. He could be one out of the box, but he'd need to be to pump out the scores we want in a side that might only win 2 more games for the season. He can't go 35 possessions and 3 goals in losing teams too often.
SJ - beats up on weaker teams. From round 12 Geelong play: Carl, StK, GC, Ess, WB, Melb, GWS, Nth, before he gets Crowleyed again. He could average 125 in that stretch!
Dal - scores in wins this season: 119, 128, 134, 135, 140 - ave 131, scores in losses this season: 75, 94, 96, 106 - ave 93. North's draw includes games against:
WC, Rich,
Ade, Melb,
Bris, Haw, StK, Car, Geel,
GWS, WB, Ade, Melb. (
interstate games) You would think North can win 8 of those games. At his current season averages, that gives him (8 x 131) + (4 x 93)/12 = 118/game from here. I know it's not that easy, but you get the idea.
Barlow - The poor mans Swan (pre-2014), if Fyfe is the poor mans Pendlebury. Forgive him his first 2 games back from a ligament strain, and he's averaged 120 in the other 3 games. Scored 100+ in every game from rnds 7 to 21 last season (missed round 14, and had a bye round 11) and averaged 118 in those 13 games, so can maintain a 115+ over a long period.
Goddard - In 2010 he posted 15 130+ scores, including 2 GF's. Since then he has only recorded 7 130+ scores in 71 games. Those scores all came in winning games, and the margins were: 6, 20, 24, 30, 39, 65, 92. Too many question marks to be taken with confidence. I think his level these days is in the 108 range, and I think you might want better than that for your M8.
On value, I'd go Goddard, Barlow and SJ (after his B/E 168 disappears in a game or 2). On a pure points basis, I'd go Fyfe, SJ and JPK.
Good luck.