Each attribute is added 1 unit or % at a time; if you spend 10 points on Life leech get a 1% increase, if you spend the 10 points on self repair you get I unit of self repair.
That definitely makes some things pretty expensive!
What should you focus on then. I saw an axe yesterday that had 44/48/48 HLL/HSL/HML and like 48% DI along with some other random stats like Spell Channeling. No hit spells except 50% dispel.
What would you level up as a priority? DI and hit spells? HCI?