80-85 - Effigies / Dragon Bones from Slayer.
85-90 - (G Altar) 8200 Dragon Bones, costing about 41mgp.
90-99 - (G Altar) 30500 Dragon Bones, costing about 152mgp.
Note: Assuming Dragon Bones are 5k each.
Runecrafting (20m) (315 hours)
80-99 - (ZMI) 40kxp/hr = 275 hours.
80-99 - (ZMI) 30kxp/hr = 315 hours.
Note: The first estimate assumes accurate clicking, the second is more accurate.
Construction (-60/120m) (40/20 hours)
80-99 - (Oak Dungeon Doors + SC) ~60mgp costs. 600kxp/hr, so 20 hours.
80-99 - (Oak Dungeon Doors) ~120mgp costs. 300kxp/hr, so 40 hours.
Note: This does not factor in the time to gain SC hammers.
Agility (0m) (150+ hours)
75-80 - (Ape Atoll) 45kxp/hr = 18 hours.
80-85 - (Dorgesh-Kaan) ?
85-90 - (Advanced Gnome) ?
90-99 - (Advanced Barbarian) 66kxp/hr = 116 hours
Note: This assumes a fairly average xp rate.
Mining (0m) (193 hours)
85-99 - (LRC Gold) 50kxp/hr = 193 hours
Note: Average rate assumed & all ores will be used for smelting.
Smithing (+11m) (140 hours)
85-99 - (Goldsmelting + Gaunts) 70kxp/hr = 140 hours
Note: Ores will be from 99 mining, goldsmithing gauntlets used.
Firemaking (-3m) (57 hours)
90-99 - (Maple logs) 135kxp/hr = 57 hours
Herblore
Thieving
Crafting
Farming
Summoning
Dungeoneering