Jahydin
Hero
Sorry, didn't mean to just dump my houserules and bounce.
My first thought would be everyone would just choose weapon, save, skill in that order every time.
Second thought would be slowly increasing the +1 bonus across multiple levels doesn't buy you much. "To Hit" bonus increase, no matter when it's gained, will always be the point where the "boost" is felt.
Third thought is the real "boosts" come from the Class Powers gained, not the slowly increasing Prof bonus.
Anyway, good luck to you.
Another (even simpler) option is to just do "groups": weapons (including spellcasting maybe?) or "combat", saves, and skills. Instead of improving things individually, you get to improve a group when you level up.
For example, 1st level is:
Weapons +2
Saves +2
Skills +2
At 2nd level you might improve weapons:
Weapons +3
Saves +2
Skills +2
3rd level might be saves:
Weapons +3
Saves +3
Skills +2
4th level would be no increase since that is the ASI level.
5th level would be skills:
Weapons +3
Saves +3
Skills +3
So, at 5th you are +3 across-the-board. Repeat the idea for 6th, 7th, skipping 8th, and 9th levels to bring it all up to +4.
But this doesn't have anything to help with gaining new proficiencies so I'm not sold on it.
My first thought would be everyone would just choose weapon, save, skill in that order every time.
Second thought would be slowly increasing the +1 bonus across multiple levels doesn't buy you much. "To Hit" bonus increase, no matter when it's gained, will always be the point where the "boost" is felt.
Third thought is the real "boosts" come from the Class Powers gained, not the slowly increasing Prof bonus.
Anyway, good luck to you.