you've had lame suggestions so far so here goes... hope this helps.

MAGIC:
1-13-air strike
13-35-fire strike
35-45-fire bolt
45-55-camelot teleport
55-94-high level alchemy

Total cost- 16m
Quests required-desert treasure
items required-2k law runes, 121k natures and yew longs (buy in stocks dependant on how rich you are)

Range:
1-40-train at monks at prayer guild. use bronze arrows and pick them up
40-70-train at moss giants west of fishing guild. use bronze.. pick up
70+-train at ogre cages or greater demon cages- iron knives preferable
pest control also a good option

Total cost-20m+ if using iron knives and not picking up and going to 99
Quests required-roving elves for crystal bow
items required-10k bronze arrows, 400k iron knives, range set, range ring, amulet of glory/fury


Melee- use scimitars. train at rock crabs until 60 attack. then go to experiments using dragon weapons. dragon scimitar preferable for strength. abyssal whip preferable for attack.

Items required- beserker ring, d scimitar and drag dag (no poison), whip for attack if going above 70

quests required:monkey madness, lost city.

total cost- around 5 million

i will add anything i may have forgotten