What loco's are you then going to use to run the existing H sets on the Bacchus Marsh/Melton runs in the interim?
The H sets are just about dead anyway. The above is once they've been scrapped or given to preservation groups.
Although in the short term, you could have:
4x P - BTH - BIH - BH - BH - BIH - BH - BCH - P sets (Melton 40min services)
6x N - BTH - BIH - BH(L) - BCH sets (Seymour 40min services)
8x N - BN - BN - BDN - BRN - ACN - D sets (Warrnambool, Swan Hill, Shepparton, Bairnsdale each 3 per day)
3x N - BN - BN - BDN - BRN - ACN - PCJ - N sets (Wagga Wagga 3 per day)
3x N - BTN - BTN - BTN - BTN - BTN - BZN - BCZ* (Geelong peak only)
With Sprinters and Vlocities running all other services.
*2 sets with BCZ, 1 set with leftover ACN but advertised as second class
3x ACN -> BN
2x ACN -> BDN
6x BRN -> BDN
2x BTH(L) -> BH(L)
2x BCH(L) -> BH(L)
2x BCH -> BH
3x BTH -> BH
DN 403 -> D 338
PH 451 -> D 332
2x N Class (Both BG in workshop; run Wagga service with 2x N sets; third always in workshop)
4x Y Class (1 Geelong, 2 Southern Cross, 1 under maintenance)
4x A Class (Stored)
4x MTH (Although they're controlled by Metro; if they can go to V/Line then these plus the 2 BIHs inserted in the Seymour sets)
3x PH (Kept at Southern Cross for emergency use when HEP dies on a consist)
By 2015, scrap/sell all Z sets; add their three N Class locos to the "spare" pool. Also get rid of the A Class locos.
By 2020, scrap/sell all H sets; that gives 25 N Class locos to 11 N sets.