Background Knowledge: The Maximum Value for Mana/Life leech I have determined via an email with Mesanna. The new equation (which uoguide is wrong) is as follows: Melee Max = min(100, max (31, 6.25*trunc(400 Base speed / (100 + SSI%))) Ranged Max = trunc(0.5 Melee Max) Question: Normally on intensity calculation the equations follow a pattern: Rounddown(Max Intensity * Imbued / Max Value , 0) or rounddown(110 * x / Melee Max or Ranged Max , 0) This is not entirely the case for mana/life leech. Answer: Thanks Basara! The imbued values and the maximum imbueable intensity are truncated. You get a maximum of 25 "clicks" (options) in the imbue menu. So for a wep with a maximum of 68 mana leech (shown in menu) u actually have the following: 1 click = 1 * 68.75 / 25 = 2.72 (adds 2% to wep), rounddown (2.72 / 68.75 * 110 , 0) = 4 intensity 2 clicks = 2 * 68.75 / 25 = 5.44 (adds 5% to wep), rounddown (5.44 / 68.75 * 110 , 0) = 8 intensity 3 clicks ... 25 clicks = 25 * 68.75 / 25 = 68.75 (adds 68% to wep), rounddow (68.75 / 68.75 * 110 , 0) = 110 intensity Possible UO Error: Example Lets take a Melee Wep with a base speed of 3.25s. Senario 1: Imbue 20SSI then 35 mana leech - Intensity = 134 Senario 2: Imbue 35 mana leech then 20SSI - Intensity = 121 Senario 3: Imbue 35 mana leech, 20SSI, then 35 mana leech again - intensity = 134 It appears there is an "error" in the coding of UO where the intensity of mana/life leech is only updated when you imbue it. So, in effect, if you wanted to have a higher mana/life leech value you only need imbue that mod first and then add the SSI second. Having said that, inputting this into a spreadsheet (for my imbue calculator) is not possible. Instead, I put the most conservative option (Imbue SSI then Mana Leech).