What to twink? Wood Elf Ranger or Dark Elf Necro

[Karthil]

If you're asking about pure return on investment, then a melee will win in twinking over a caster every time. Items just won't make as big of a difference for casters as they do for melee (with a few exceptions, like velious pants for chanters and clerics).

A Zheart will make your necro more efficient, but you're going to always be limited by mana and you can't increase the amount lich does.

Your ranger on the other hand can have haste, op weapons, and fungi, all of which will make the ranger a machine from levels 1-~40, and still very strong until low 50s.

Some caster items can change the game quite a bit, but mostly it just makes them more efficient (which isn't a bad thing at all). Melee items change them game quite a bit.