I'd buy 72-99 magic... thats 185,944 High Alchs, which is 181M. I'd get 142M back, so I'd have about 205M to spend still. I'd buy 2 of every barrows set, which would cost maybe 35M. I'd have about 170M left. Then I'd buy 50k monkfish for 15M. Then I'd buy 1,000 (4) pray pots for 10M. Lets see... thats 145M left. Then I'd buy 500K mind runes and 125k deaths for 48M. I'd then have over 95M left over, and I'll have enough supplies for a ton of barrows runs :D I'd probably also drop about 20M on 10k dragon bones, which would get me 83 Prayer :D Not sure what I'd do with the rest...