i know it's too late for your character now, but i just wanted to clarify that it's not just your might and per that needs balancing, but really a sum of all the different +damage and +accuracy bonuses you expect to have. in other words, for a rogue there's basically no point in investing in might, because sneak attack is such a consistent extra source of +damage% that to maximize your damage output you should put points into perception instead. similarly, a ranger is going to have such a huge accuracy that you're better off putting points into might than more into perception. and as a third example, if you expect to wield medium or large shields all the time, then perception becomes extremely important compared to might, because you're effectively starting off at -4 or -8 compared to might.
however, dexterity is the ultimate king damage stat. Both might and perception translate into ~2% net damage increase (it's counterintuitive, but 3% damage increase => 2% actual net damage increase due to grazes and how damage bonuses are additive). Dexterity very nearly translates into 3% net damage increase, and is useful for more than just damage. In basically any build (unless I'm going for a particular character "concept") I always prize dexterity over putting points into might and perception.
that large shield modal can be a real life saver. against those damned risen archers, i tend to send out a lone tank first with the large modal switched on shortly after so that they absorb all those killer arrow hits.
yeah. I tend to actually really like this angle. I wish the stats were a bit more balanced, but in general I like the ability to create non-cookie-cutter builds. It's a bit ironic that "cookie-cutter" builds in this game are actually a bit suboptimal due to how con and might work, but aside from resolve (which has increasing returns and a single point can make or break a build) the impact of stats are such that "suboptimal" doesn't mean "game-ruining" like it used to IWD or BG (or Fallout 1/2, for a non-IE franchise example).