ZMI is probably your best bet for runecrafting, for crafting you could stick with that or get sc needles and make green bodies. Smithing would be addy plates i guess and fletching would be alot quicker then woodcutting or you could train both by cutting yews and fletching but that would take alot longer.
Why not just add another server that is pre 07, so there would be a classic, pre 07 and the current one. I think that would be easier to do and more of a possibility.