I am building a Duegar Alchemist with a Folk Hero background who's inspired by the support/utility role builds I have been hearing and reading about. In other words, a character who focuses more on using their abilities, skills, spells and tools to buff up and round out the party rather than dealing direct damage, controlling the battlefield, or taking up a more specific role. I am hoping to accomplish this by:
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Using his skills from Cooking tools to make sure the party's well-fed, from Mason tools to analyze the buildings they might find themselves in while skills from his Thieves' tools assures them a way to escape, from Smith and Tinker tools to keep the party's gear up to snuff, and Vehicle (land) proficiency to assure that the party makes it from one place to another safely (Mason from his race, Cooking and Vehicle from his background, and the rest from the Artificer).
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Using a combination of Magical Tinkering and Alchemist tools to prepare spells like Guidance, Mage Hand, Alarm, and Grease, as well as distractions and deterrents like alchemist fire or a throwable box that either shakes to attract purple worms or smells to attract werewolves… perhaps even other grenade-like traps…
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Using his Infusions on party members, such as to beef up the Barbarian's axe or buff out the Fighter's armour.
In actual combat, I plan to focus primarily on buffing my allies or doing ancillary actions around the encounter, but directly attacking is not my primary goal.
Now that I hopefully painted a picture of the character type I'm trying to build, my current issue at hand is to figure out how to manage his ability scores effectively. I was thinking of painting an homage to his upbringing as a pack mule by making him robust, resilient, and resourceful (using a stat array of 15 Strength, 8 Dexterity, 15 Constitution, 15 Intelligence, 8 Wisdom, and 8 Charisma), but wonder if the low dexterity of this point-buy system would get in the way of playing him as a "supporting character."
For instance, I know that the low Charisma will make him struggle at social interactions, and his lack of Wisdom would make him rather gullible or cynical (which I am willing to play into), but I am wondering if the lack of acrobatics, stealth, and other Dexterity-based abilities would be as detrimental to his role as it might for, say, a scouting Rogue, or nimble Monk? As there are weapons like slings that he can use for a strength-based ranged attacks (if needed), would it affect his ability to help the party in battle? Are there ways to use my Strength to overcome some of these disadvantages, or would it be better to use more of a standard array to achieve my build goals?
Best Answer
You need Wisdom more than you need Strength.
So the obvious shortcomings here are that low Dexterity and Wisdom make you vulnerable to attacks and saving throws targeting Dexterity and Wisdom (Artificers are proficient in Intelligence and Constitution saves).
Fixing the Wisdom is easy: swap your Wisdom and Strength scores. Wisdom and Dexterity are the most often targeted abilities for saving throw-based spells, and the value of not failing against hostile Wisdom-based spells cannot be understated. Now, setting your Strength to 8 means Strength-based weapons are no longer a viable option, so to maintain some offensive utility, I recommend dropping mage hand in favor of an offensive cantrip such as fire bolt. This would allow fire bolt to synergize with the Alchemist's 5th level feature:
As NautArch explains in his answer, there is no such thing as pure support. Having a viable offensive option is a necessity, and a boosted fire bolt is a good one.
Living with 8 Dexterity: half-plate, a shield, and the Resilient feat.
Dealing with low Dexterity requires a little more investment than dealing with Wisdom. There are two things you need to acquire to make your abysmal Dexterity score less of a problem:
Our Dexterity modifier is negative, so we need one of the higher tier medium armors to offset it, and you might even consider taking the Enhanced Defense infusion to boost it further:
Half-plate infused with this infusion would set your AC at 15, and adding a shield to that boosts it to 17. The folk hero can start with scale mail, so your starting AC with scale mail and a shield would be 15, and adding Enhanced Defense to it gets you to 16. But even a single point increase to AC can have huge benefits, so getting half-plate should be a priority. At 6th level, you can even boost your shield with the Repulsion Shield infusion:
So Enhanced Defense half-plate and a Repulsion Shield shield would give you an AC of 18 at 6th level, with only 8 Dexterity.
Finally, boosting your AC doesn't help with Dexterity saving throws. However, at 4th level, we can take the Resilient feat:
This gives us proficiency in Dexterity saves, which is a huge boost to our resilience against hostile effects that target our Dexterity save, as well as setting us up to take (+1 Dex, +1 Con) with out 8th level ASI, and the Durable feat at 12th. These things will make you quite the tank, despite having only 8 Dexterity, which means you can focus on filling your support role with your spells without worrying about getting killed.
This build allows you to cover your weaknesses without needing to lean on spell preparation choices at all, and only takes up one or two of your infusions, allowing you to use the other two to give cool items to a couple of your allies.