But it is a strategy of it's own, isn't it? You can die to will-hitting attacks, and why shouldn't being a physical character(he has to reach you to hug you, and succeed on the dex check to hug you,and the str check to keep you from getting away...) be as rewarding as being a mage, especially if you're using magic to accomplish said goals?
The point is, the character would be getting too much. Somebody like Igor would not only be good at resisting stuff, but also would be a good mage. It is essentially giving someone the possibility to use ones as sixes. And that is game breaking. Yes, he needs to hug you and all, but if you compare him with a mage character, you will find that the maluses from strength are likely going to be the same. So, you are in about the same position than someone (barring dex, but wrestling is more str based), with the difference that said person is inmune to a kind of magic he uses, which means that the mage can't use that kind of magic against the other one either. So, we have a mage that is invulnerable to a kind of magic (plausible), but from the start (plausible at extreme costs), and that can perform as well as a moderately specialized character. That's is too much.
But I suppose my real quarrel is this: the mark of a good tactician is the ability to turn weaknesses into strengths,and liabilities into assets. And you seem opposed to this.
The mark of a good tactician is making the best possible use of your strengths, and hiding or otherwise don't allowing your weaknesses to be exploited. What you describe would be a godlike tactician.
Without getting into specifics definitions and all, there is a line that can't be crossed without making the exploit overpowered and transforming it into the general way to play.
I mean,hell, I know a shitton of words, it feels like, with all the testing I've been doing, but I have shitty stats so it's likely it won't matter, especially now that my leg is trying to throttle me.
The problem you had with magic was a matter of both the RNG and non-RNG luck. The RNG because of your 16.66% of probabilities of failing. Non RNG luck because the effects of a failure depend on the words used, and in certain cases, said failure only means that no information is given. Your charater has a good specialization for doing science with words witohut tangible effects. You are actually more specialized than what you think. The problem is, you can't do many things with them, unless you make an efficient use of the overdrive mechanic and the focus mechanic. In fact, you can instantly gain a +2 in any given stat (and with luck, even more for those in which you have 0). Knowledge is also valuable, allowing trade and diplomacy. The alternatives exist, but it depends on the player to see them.