The meditation power scroll is the best form of raising the magery cap in the Ultima Online game and grants higher casting success rates. Max out the mana regen on your suit with the bonus from UO meditation scroll. This is used by most maged so that you don't have to wait for mana after spamming some spells. When you have legendary meditation and a bunch of mana regeneration gear you will always have mana no matter how fast you cast spells.