I think Godwars is the best because u can train while u earn cash

First money making method

Thieving
Use Pk Teles and tele to edgeville and rob the stalls

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Next money making method.
Godwars
Gear:Ghostly hood or a some full helm,Black d hide chaps,Black d hide vambs,Amulet of fury,Climbing boots,Random cape,Use a godsword or Dragon scimitar,D scim is good weapon too for Bandos boss, Bandos boss can be very profitable.Use Melee protect,Ultimate Strength and Incredible reflexes.What Stats need to go, atlast: 60-75Atk,85-99 Strength,Def doesnt matter much so 1-99 and Pray level atlast 43.
Inventory:8 Prayer pots, a dds whit u and 19 Sharks or better food.
Third money making method.
Dagg Lair
U can take same gear as in Godwars and kill Dagannoth Rex he drops: Rings like Berseker rings.And ofcourse use Melee protect and Ultimate Strength.
Stats: 60-99 Attack,60-99 Strength,also def doesnt matter here 1-99 and prayer 43.
Inventory: just take 28 pray pots whit u if u melee protect it wont hit you.
Fourth money making method.
Crafting
Use normal spellbook and tele to skilling , take cash whit u and buy chisel and uncut gems , use chisel on uncut gem.
Fifth money making methid.
Barrows
To tele to barrows u need to click on spellbook minigames teles and tele to barrows

use the spade on the hills and it gets u to the cave and then click on the coffin.
and dont forget to use the prays Melee,mage,range but dont use pray on verac because it hits thru pray. Stats: 75-99 Attack,90-99 Strength,Defence 60-99,Prayer 43-99, but if u are pure u can also do barrows whitout defence level.