I'd try to explain on example of my Breton witch-hunter born in Ritual.
So, the first two levels i concentrated on misc. skills to raise STR, SPD, END. It's easy. Just so not employ major and minor skills to avoid level-up too fast. I managed to raise attributes at max. (i.e. 5).Now i believe it's time to start with some attribute of main assortiment, say, INT. The problem is almost all (save security) key skills for INT is in maj./min. list. There is no problem to raise INT (alchemy comes in mind), but i still would like to get 5es for all attributes i'm going to raise. I cannot use shield, for one thing - it'd advance next level, too, though i can allow to raise min./maj. skills not related with INT only as far as i can compensate it by security (not very much, i fear) and choose other attributes i'm going to rise from represented profitable enough in misc category. I even should use bound armour with care to avoid development of light armour skill and unarmored skill
I hope you can see what i'm thinking about.
It's quite possible the problem is solved and tactics (what to do between levels) and strategies (what way and sequence to choose) are already developed.
Would be happy to hear your thoughts (well, see in this case
TIA,
L.