You forgot Heavy Armor focus feat so that is +1 AC for heavy armor. Also good luck tanking in round one when you are more often flat footed than not (enemies in this game have insane rolls, I am pretty sure RNG code they use is busted) and all the situations where you can also have your Dex denied.
Isn't Int spellcasting stat for Alchemist? Why would you buff up wisdom?
Armor Focus is a dedicated tank feat, that's quite expensive for what it offers. If you pick it, it's fine. You've narrowed the dex/wis advantage in act 2 to only 2 AC. End game it's still about 10, not counting the Crane line.
Speaking of which, Crane Style seems to me to be a much better 1 feat investment on a multiclass with a monk dip then the Armor Focus (+1 AC AND +2 AB - when Defensive Fighting, makes the mode much more useful).
As for flat-footed, a Vivisectionist also gets up to +6/8 natural armor. I'm not 100% sure, but I think you're not losing the monk bonus unless immobilized.
Anyway nothing is preventing you from sending a tin can first (if you have one) to draw the initial enemy aggro. That's what I do.
Int governs alchemist extracts, but you don't use any DC spells, just buffs. So theoretically 10 Int wit a +8 Int item (-2 Str mutagen) would be enough to cast all spells. I like to start with 13 for early Combat Expertise & Trip, as well as skills.
Wis offers more: monk AC and Will saves.