Guide:Thrileon's Guide to Double alchemy crafts

In this guide i will show how you can get 99.75% chance to craft x2 potions per craft on alchemy.

we need level 10 character to get there. But we have good chances before that. (sorry for my english english is not my native language)

First we need the character. i prefer to use hireling because this character will stay in camp is not going to fight. so step by step. i will show you the important choises and then ill explain everything.

Level 1 - Wizard lvl 1 - 16 wisdom + medicine proficiency Level 2 - Wizard lvl 2 - Subclass Trasmutation Level 3 - Cleric lvl 1 - Guidance cantrip Level 4 - Cleric lvl 2 - Level 5 - Cleric lvl 3 - Spell : Encance Ability Level 6 - Cleric lvl 4 - Feat -> Ability Improvement -> +2 Wisdom Level 7 - Bard lvl 1 - Level 8 - Bard lvl 2 - Level 9 - Bard lvl 3 - Expertice Medicine Level 10 - Bard lvl 4 - Feat -> Ability Improvement -> +2 Wisdom

How it works. The wizard - Trasmutation school at level 2 gets Experimental Alchemy (subclass Feature) where You can brew two alchemical solutions instead of one when combining extracts, if you succeed a DC 15 Medicine Check (Wisdom). Then we increase our Dice bonus from other subclasses to increase our chances to success to 99.75% at lvl 10.

We start with 2 level on wizard to get the Experimental Alchemy. At this point we have 55% success chance. Because 15dc (+2 medicine proficiency +3 wisdom) -> 1D20 = We need 10 or moree on dice.

Now we Multyclass to get 4 levels with Cleric. From first level of Cleric we get Guidance. That will give us 1D4 bonus on roll at craft for now. From level 3 Cleric we get Enchance Ability spell. We buff our self Enchance Ability -> Owl's Wisdom to get advantage every time we craft with alchemy. From now on we dont use guidance with this toon only Owl's Wisdom because both are concentration spells and advantage is much better than 1d4. (if you have some other toon to give guidance to crafter is welcome). From level 4 cleric select FEAT -> Ability Improvement -> +2 wisdom. At this point we have +3 from medicine + 4 from wisdom + advantage. So we need to hit 8+ with one of the two dices. (if you give guidance 1d4 from another toon even better).

Now we multyclass again to get 4 levels with Bard. First two levels dont have anything important But at 3rd level of bard we sellect Expertice Medicine. To increase more our bonus to roll. At level 4 Bard we select FEAT -> Ability Improvement -> +2 wisdom. And this is it.

You should have +5 from Wisdom +8 from medicine and advantage on roll from Owl's Wisdom. 13 bonus is enough because is DC 15. If we hit 1 is critical fail... so even if you have +15 bonus you fail. So 13 we have from bonus +2 from dice = 15. Because more bonuses are useless the only usefull thing is advantage we get from Owl's Wisdom. Advantage means we throw two dices insteed of one and we use the higher number. So the only way to fail is to hit 1 with 2D20... this is like 0.25% chance to hapen....