I can only speak from my experience, but Enchanter starting with 3 Strength, 7 Charisma, and 4 everything else works well for every situation. Of course there are better starts, but they require bonus points. If you need a few points then here https://itch.io/t/568816/triple-ironman-speedrun-thief 2 different ways to get 3 achievements on Ironman mode (so 3 points, instead of 1.5).
Important skills to max (in no order) Spring Attack, Careful Attack, Tempo Attack, and Armor Crusher. I know some will say Armor Crusher is pointless, but it's nice to have just for those annoyingly armored foes.
As you get Soul Crystals you can use them to upgrade your weapon, only weapons to really use are Club, and Rapier (Club Strength>Agility, Rapier Agility>Strength) though if you need a weapon quickly, do the ruins (you WILL need boots).
Use perk points for the 6 -ers (stronger, faster, harder, ect) first, prioritize Agility, Perception, and Endurance. The idea is to make it easy to dodge and hit your enemy, as well as dodge overworld hazards/traps (Agility), to know whats coming up on the map and what attacks your enemy is about to use (Perception), and to keep up an unrelenting assault (Agility+Endurance).
Money isn't too important, except for getting food (done by resting at an inn), other then that, get the stat boosting gear (second town/town of monsters), get the hunger charm (random overworld chest), and save for the best armor.
Source, myself, someone with all Ironman achievements.
