Chart for formulations for the new cure formulas, giving all tiers and scales. Each scale is for power surpassing the cap of the tier before it; the chart does not use the wiki method of regressing all the way to 0 for your initial offset for each tier.

Code:
                        Cure 1  Cure 2  Cure 3  Cure 4  Cure 5  Cure 6

Min HP                      10      60     130     270     450     600
Min Power                    0      40      70      70      80      90
Scale Tier 1                 4       1     2.2       1     0.7     1.5
Power Cap Tier 1            20      70     125     200     150     210
Scale Tier 2               4/3     5.5   75/65       2    1.25     0.9
Power Cap Tier 2            40     125     200     300     190     300
Scale Tier 3               8.5     7.5     2.5    10/7   70/38    10/7
Power Cap Tier 3           125     200     300     400     260     400
Scale Tier 4                15      10       5     2.5       2     2.5
Power Cap Tier 4           200     400     700     700     300     500
Scale Tier 5                20      20                     2.5     5/3
Power Cap Tier 5           600     700                     500     700
Scale Tier 6                                              10/3
Power Cap Tier 6                                           700
HP healed for a given amount of power for each spell can be calculated as such:

Min HP +

{for each tier}

TRUNC(MIN(MAX(Power-PreviousPowerCap,0),(CurrentPowerCap-PreviousPowerCap))/CurrentScale)