<p>I think i finally can answer completely this, with a friend some months ago we started calculating ourselves the formula of mana leech (since the actual one being used is really difficult to be put in practice), we tested damage over several mobs, specially using different kinds of mobs since in a hunting ground we would mostly face at least 2 kind of enemies which mostly have different resistances, all this lead us to think about a formula that could be used without us knowing which would be the average damage on different mobs, so after some struggling we found a constant that allowed us to develop a "base" formula useful in every scenario with mana leech:<br><br>We would leech:<br><br>Out of a powerful Void imbuement we will leech 8% of our damage dealt +1% per each extra creature divided between the quantity of creatures, which would end like this: (leech%+ (creatures-1)%)/Creatures<br><br> </p><table (creatures-1)%)/Creatures:<br><br> </p><table border="1" cellpadding="1" style="width:800px; border-spacing: 1px;"><tbody><tr><td>Quantity style="width:800px"><tbody><tr><td>Quantity of creatures</td><td>Leech per creature (based in the damage dealt to each)</td><td>Total Leech (based in your total damage dealt)</td></tr><tr><td>1</td><td>8%</td><td>8%</td></tr><tr><td>2</td><td>4.5%</td><td>9%</td></tr><tr><td>3</td><td>3.333%</td><td>10%</td></tr><tr><td>4</td><td>2.750%</td><td>11%</td></tr><tr><td>5</td><td>2.400%</td><td>12%</td></tr><tr><td>6</td><td>2.167%</td><td>13%</td></tr><tr><td>7</td><td>2.000%</td><td>14%</td></tr><tr><td>8</td><td>1.875%</td><td>15%</td></tr><tr><td>9</td><td>1.778%</td><td>16%</td></tr><tr><td>10</td><td>1.700%</td><td>17%</td></tr><tr><td>11</td><td>1.636%</td><td>18%</td></tr><tr><td>12</td><td>1.583&</td><td>19%</td></tr></tbody></table><p>That said, the answer to the question is: the lesser ammount of creatures the higher the leech per individual, the higher the ammount of creatures the higher the total leech in a single turn, but all this is based in the total damage that dealt. So:<br> </p><ol><li>The leech is based in the damage the in the damage that you were supposed to do to each creature based on their resistances but not taking into account their actual/max hp (so would leech the same out of a creature with 5 hp than with a creature with 2000 if these have the same resistance).</li><li>Paladin is the only vocation that must choose between target or aoe damage of the same nature completely, so their damage is reducted if we compared diamond arrows against spectral bolts, for a diamond arrow to leech more in a single turn than an spectral bolt it would need to deal higher total damage, roughly after landing in 3 targets with similar resistance a diamond arrow will be doing similar or higher total damage than an spectral bolt, <strong><em> </em></strong><u>in so<strong><em> </em></strong><u>in paladins case</u> <strong><em>if there is less than 2 creatures, a spectral bolt will leech more than a diamond arrow, higher than that and a diamond arrow will be outperforming the spectral bolt due the similar damage + extra leech bonus.</em></strong></li><li><u>In mages case,</u><strong><em><u> landing their aoe damage in more than 1 target will always provide them more total leech,</u></em></strong> case,</u><strong><em><u> The higher the ammount of targets hit with an aoe damage, the higher the leech obtained,</u></em></strong> while their damage with sudden death rune depends on the different resistances but will most likely follow the same pattern than auto attacks from paladin (creatures > 2 = higher damage from aoe).</li><li><u>In knights case,</u> they dont have to choose at all, their target attacks wouldn't have reduced damage even if using cleave, and their rotation is more likely based on aoe spells so <em><strong>the <u><em><strong>the higher the ammount of enemies they attack with the same spell, the higher the leech for them, annihilation being used only when there are lesser than 3 enemies.</strong></em></li></ol>enemies.</strong></em></u></li></ol><p>Source: <br>Test made personally (Special Thanks to Gred from TibiaWiki team for helping me creating and testing the formula) </p>