I'm assuming Estates and no Colonies? I can get 59 for Green Idol, but I really feel like it should be possible to do better. Also I haven't double-checked it so I almost certainly made some mistakes somewhere. The idea is get as many Hunting Grounds as possible and Stonemason them into Dukes and Duchies, and use Sage and Crossroads to skip over all your dead cards. Based on the kingdom cards though, I get the feeling I was supposed to do something with Scout/Crossroads for draw, and then Coppersmith to make a lot of money.
T1: Draw CCCEE; Buy Sage
T2: Draw CCCCE; Buy Death Cart, gaining two Survivors
T3: Draw CCC, Survivors, Sage; Play Sage, skipping all cards and drawing Death Cart; play Death Cart, trashing Survivors; buy Stonemason, overpaying by $6 and gaining two Hunting Grounds
Current Deck Contents: CCCCCCCEEE, Sage, Death Cart, Survivors, Stonemason, 2 Hunting Grounds
T4: Draw CC, Sage, Stonemason, Hunting Grounds; play Sage, skipping all other Coppers/Estates/Survivors, drawing Death Cart; Play Stonemason, trashing Hunting Grounds, gaining three Duchies; buy Crossroads
Discard Pile: CCCCCCCEEEDDD, Sage, Stonemason, Survivors, DC, Crossroads; Deck: HG
T5: Draw HG, Crossroads, DDD; Play Crossroads, drawing Sage, Stonemason, Survivors; Play Sage, skipping CCCCCCCEEE, drawing Death Cart; play Stonemason, trashing HG, gaining one Duchy and 2 Dukes; play Death Cart, trashing Survivors; buy Death Cart, gaining 2 Survivors
Deck: CCCCCCCEEEDDDD, 2 Dukes, 2 Survivors, 2 Death Carts, 1 Crossroads, 1 Sage, 1 Stonemason
T6: Draw DDDD, Crossroads; Play Crossroads, drawing Sage, Duke, Survivors, Death Cart; Play Sage, skipping CCCCCCCEEE, Death Cart, and drawing Death Cart; play DC, trashing Survivors; play DC, trashing itself; buy Stonemason, overpaying by $6, gaining two Hunting Grounds
Discard Pile: CCCCCCCEEEDDDD, Duke, Crossroads, Death Cart, Sage, 2 HG, Stonemason, Survivors; Deck: Duke, Stonemason
T7: Draw Duke, Stonemason, Crossroads, Stonemason, Hunting Grounds; Play Crossroads, drawing Hunting Grounds; Stonemason both HG’s for 3 duchies and 3 dukes
Finish with 3 Estates, 7 Duchies, and 5 Dukes for 59 VP.
You can also go for 8 Duchies and 4 Dukes for the same number of VP.
I think you might be able to improve if you can work a Nomad Camp in there somehow instead of the second Death Cart?