You won't be using a full plate with Valerie at level 2 though. Even if you bought it for her (and there are better ways to spend your early money - like getting a good custom character) with her 14STR she would crumble under the combined weight of a full plate + tower shield.
Idk, i want to finish game with full content at least once. And, no - she will no crumble and there are hardly better options to spend money.
On a tower shield specialist with reasonable starting stats and feats compared to Valerie:
- switch Toughness and Bastard Sword proficiency for Dodge and Heavy Armor focus = +2AC. On a tank you want to stack AC not a few more HP and she is not meant to be a primary damage dealer so that bastard sword is pointless, use a longsword instead.
She already starts with Dodge. And Toughness, while questionable, still makes some sense considering the fact that you are not getting max hp per level up.
Bastard sword is really fucking dumb though, i agree.
In addition with levels she could use even more DEX for AC but because her STR is so low you might want to raise that first which means that with levels the difference between Valerie's AC and a min-maxed Tower Shield specialist's AC will be even bigger later on.
Still not 6 or 7 points difference but even 3AC early is a big difference.
She could use a lot of things, like -8 points to charisma and -2 to INT with buffs to STR/DEX instead, true. But then she would not be Valerie - just random statbot #17532 instead.
She will be constantly at heavy load. Though I suppose in P:K it might not be such a big deal.
As to spending money - sure if you don't want to use custom mercs then yes. But some other people will want to make custom mercs and from that perspective, buying a custom merc is the better investment at this stage.
Then not dodge but shield focus, same result.
The point is that Valerie will be a few AC below a well built char of her specialization and deal less damage at the same time. Her stats from "roleplaying" perspective is a different matter and not something I was talking about answering your posts. But if you really insist on talking about that - this a combat focused game with overtuned enemies compared to pnp. It is not that unreasonable to expect NPCs to match that.
And finally even from ropleplaying perspective her stats aren't that well done if you think about it. I mean, where does the 19 CON comes from in her backstory? She isn't supposed to be a female Conan (and even the actual female Conan only has 16). I think it would make much more sense to move some CON (at the very least the odd point) somewhere else. From BOTH mechanic AND writing/roleplaying perspective.