So most bleachfans know full-well that if somebody in canon has a higher Reiatsu, it does shit to those with significantly inferior Reiatsu.
So here's my suggestion, which I'm opening for discussion. What if we used the chart system to impose this in some manner?
Those with -1 Reiatsu against someone would be negatively affected slightly
Those with -2 Reiatsu against someone would be negatively affected significantly
Those with -3 Reiatsu (less than 1/2) against someone would be negatively affected severely.
Now the problem with this, is that those with significantly higher Reiatsu are ALREADY at an advantage, due to having superior stats.
On the other-hand, this could give people a reason to make sure they spread out their extra technique purchases, rather than piling them together, because letting their Reiatsu slack too much would penalize them twice.