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Message: <blockquote data-quote="tetrasodium" data-source="post: 8834011" data-attributes="member: 93670">the 2e rules for it had a lot of one off  & hard coded stuff for individual combos making it a good place for inspiration but needing work to convery into a formulaic framework  I put together <a href="https://docs.google.com/spreadsheets/d/1_gDYbw6DqunJBNsQLCeagpvltvhedw_NwuOBJOzwRcc/edit?usp=sharing" target="_blank">this</a> little setup for accomplishing that while sanding down issues that were present in 2e dual/multiclassing a while back & it seems to work well[spoiler="rules"]I'm going to get technical for simplicity & clarity of explanation without examples<ul> <li data-xf-list-type="ul">The terms class1 & class2 are used for simplicity un description.  Class1 is whichever class higher or equal in level to class2 (the lower or equal level one) </li> <li data-xf-list-type="ul">class1 & class2 have their own parallel to the single class exp tracks starting at 0->300->900->etc ones but are subject to a 2.5x multiplier (0->750->2,250->etc) [ispoiler]REMEMBER: experience needed for each level increases at a nonlinear pace so there will be some slowdown in progression but not cripplingly so[/ispoiler]</li> <li data-xf-list-type="ul">You can dual class at any time (including level 1 with zero exp) but both classes are subject to the 2.5x multiplier & you must makeup the 2.5x gap if not starting at character creation. <ul> <li data-xf-list-type="ul">If bob is level two with 300xp he can immediately pick up level 1 in a second class If bob wants to reach level 3/1 first he needs to fill the 150exp deficit he just created & continue till he advances to 2,250 in class1.  If bob wants to first aim for 2/2 I'm not sure if class2 should need 450exp for level 2 or 600(450+the 150exp deficit class1 started with).  There are merits for either method.  Forcing the deficit to be filled is probably good just to avoid "I don't plan to advance  class1 beyond this level" type cheese</li> </ul></li> <li data-xf-list-type="ul">hitpoints from each class are divided by 2  & added together.  </li> <li data-xf-list-type="ul">Dual classing impacts proficiency bonus (immediately).  Take the proficiency bonus for class1 & subtract the difference between class1 & class2 proficiency bonus values.<ul> <li data-xf-list-type="ul">If bob is level 10/2 he has class1 proficiency of +4 & class2  proficiency of +2 making his final proficiency bonus +2.  If he advances to 10/5 that will increase to +3 because 4-(4-3)=3</li> <li data-xf-list-type="ul">There might be a way for someone who knows the math terms involved better than I do to more concisely write that.</li> </ul></li> <li data-xf-list-type="ul">level one for both classes uses max for the hit die+con or whatever is being used by the game normally for single class characters Both are divided by 2 & added together though.</li> <li data-xf-list-type="ul">Casters can dual class but track  spells & slots separate (3.x style) rather than having them stack 5e style</li> <li data-xf-list-type="ul">You get all abilities from each class at each level but only if they can combine under other circumstances so sneak attack & extra attack combine but extra attack & extra attack do not.</li> <li data-xf-list-type="ul">Giving both sets of saves might be ok because of the hit to proficiency bonus & somewhat lagging progression.  I'm not sure about skills since there are so few skills in 5e</li> </ul>[/spoiler]It discourages cherry picking because of the proficiency bonus hit under those circumstances & hp/prof bonus pressures to take advantage of the ability to snag a bunch of levels in class2 for less than or similar to the cost of one more level in class1  as soon as they start diverging .  A dual class can be competent at both sides of their split but will almost always lag behind a straight class of either  in levels hp & sometimes proficiency bonus to (hopefully) make it a tough choice either way rather thana no brainer they feel pressured into</blockquote>

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