Lol asking for a job based skill in place of a non-combatant skill is a tad illogical. Here's the thing:
SCH SS=10%
WHM SS=18%
SCH Protect= Physical Def
WHM Protect=Physical and Magic Defense
SCH Eye for Eye=shorter recast
WHM Eye for Eye=longer recast
SCH/WHM Aero=Same
SCH Virus= STR/DEX/INT/MND reduction
WHM Virus=STR/DEX reduction
SCH/WHM Cleric Stance=same
Honestly, Cleric stance should be just like Cure/Physick, SCH should just have it as their own ability because without Cleric stance there is a clear imbalance over the potency of the job because then WHM would just have a clear advantage with being able to heal and dish out dmg as well.
Quite honestly I see a fair 2/2 tradeoff, you won't be hating Virus if you're in a party with 2 WHM, you won't be hating Eye for Eye cause quite honestly there is no reason to hate it, it's the same exact effect as SCH.
If anything SCH is hindered because it has so many CC it can set
WHM has Holy so that's their AOE
SCH need blizzard II to do something similar to a pure dmg AOE because Bane is limited to how many you can target with it
WHM has the perfect 5 skills to set and not have to worry
SCH has 7 two of which could be put aside when a WHM is in the party Protect and SS.
For SCH Protect and SS are necessary evils for SCH in order to remain equivalent in dmg mitigation potency. While yes we have Aldoquium and Succor you have Regen and the ability for your cures to combo into stronger forms.
Our cures are Physick, Aldoquium, Succor and Lustrate, while I will admit Lustrate is a more flexible cure
Physick 400 potency
Aldoquium 300 potency + dmg shield
Succor 150 potency AOE + dmg shield
Lustrate 25% of max HP 1 aetherflow charge
Embrace 300 potency
So in essence SCH has a 700 potency cure
WHM has
Regen 150 potency cure overtime for 21 seconds aka each tick is one Succor without the dmg shield 7 Succors for the cost of a regen while yes the tradeoff is that it targets one target when it comes to AOE WHM is king as well
Benediction Full cure on one target 5 mind cooldown, admittedly yes Lustrates 3 potential uses every 1 min is nice because it's also instant case it is a far tradeoff compared to how flexible a WHM heals can be
Divine Seal heal magic potency +30% for 15 seconds aka more control over how powerful their cures can be
Presence of Mind control over how fast they can cure in times of need
Cure 400 potency
Cure II 650 potency (free if Cure combo executes)
Medica 300 potency AOE
Cure III 550 potency AOE (guaranteed crit is Cure II combo goes off)
Medica II 200 potency AOE + 100 potency regen 15 seconds.
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SCH's Succor again is 150 AOE potency with puts up a barrier comparable to amount cured aka 150 potency cure. So can call Succor 300 potency
Medica II potency is 700 potency in essence that is AOE
Regen potency in essence is 1050 potency if the math in my head is right
Aldoquium is 600 potency in essence, Cure II stronger by 650 lol.
Whispering Dawn is 700 potency in essence for the total 21 seconds but can only be used every minute.
The regens that WHM can do can be used any time the single target Regen that has a potency of 1050 overtime and the Medica II which has a base cure of 200 potency and then total of 500 potency for those 15 seconds, so it's pretty much Whispering Dawn that you can use anytime and it saves you the trouble of two ticks and you have a means to control the crit rate of it via Cure II.
Fey illumination is an AOE that can add to your divine seal for a total of 50 potency increase, by itself it only offers 20% AOE effect and WHM can give themselves 30%.
I just do think it's a bit hasty to say that WHM gives more to SCH cause quite honestly SCH's support is more giving than WHM's is, the Fey illumination or using Fey Glow which is 30% but WHM can use Presence of Mind to boost their own spell speed granted for only 15 seconds.
Even though a WHM may give us more CC wise, we give back just as much through out pets AOE effects. Plus there is also ShadowFlare which slows the target aka reduces dmg dealt and acts as a dmg mitigation that supports both healers in the party.