In TOEE you upgrade your weapon's value as +1, +2, +3 as it SHOULD be when crafting. Is the same used for the "burst" variant of energy? that is, if I craft an item with "frost" (+1 enchantment), it will then upgrade to "icy burst" (+2 enchantment) at the cost of +1 for a total cost of +2? or will the total cost be +3 (and give me both abilities, and would they stack or not?)? also, how are the rules implemented for max enchantment value of non plus enchantment on weapons? that is, how many "+1 equivalent" enchantments can I stack on a weapon?