Why can't you just write down the modifiers rather than the actual values? So you have your regular attack of say +10 for 2d6+6 damage, you know that power attack is -1 for +2, you don't need write +9 for 2d6+8, +8 for 2d6+10 etc, you can just note the penalty for bonus tradeoff. For ranged, the penalty is -2 for each range increment beyond the first, which is noted in stat block already under "range", point blank is just +1 attack/damage within 30ft and so on, you don't need to actually write out a whole separate attack block just for a very minimal adjustment, do you?