I would boost survival more for its effects on initiative and (to a lesser extent) elemental resistances than for luck. I've mostly kept survival and speed not too far below my character level, though others have concentrated more on strength or agility and done fine.
Quality;
Uru (green, weak)
Ser (blue, small)
Min (red, medium)
Pag (silver, large)
Yit (gold, very large)
Effects;
Umn => vitality (20, 40, 60, 80, 100)
Iceri => mana (20, 40, 60, 80, 100)
Joph => agility (1, 2 , 3, 4, 5)
Koor => intelligence (1, 2 , 3, 4, 5)
Vorr => constitution (1, 2 , 3, 4, 5)
Isos => Durability (of item/weapon)(5, 10, 15, 20, 25)
Zand => Survival (1, 2 , 3, 4, 5)
Ook => regeneration (1, 2 , 3, 4, 5)
Ydra => strength (1, 2 , 3, 4, 5)
Ustr => evasion (1, 2 , 3, 4, 5)