User blog comment:Aicilespear/Some recommended sets of SP for the Six Heroes (and perhaps more)/@comment-26336535-20160426211926

Hm, the thing with maxing out Eze's spark buff instead of going for his Crit buff as well is that the damage multiplication is better with the latter decision.

Assuming no other buffs besides Batootha, ES, SBB, and SP skills:

Maxing out spark gives you

1.5 base Spark multiplier   .5 from Batootha   .5 from ES    1 from SP   1.2 from SBB   .5 Crit from ES   and 1.5 base Crit multiplier

so 4.7 total Spark multiplier multiplied by 2 crit multiplier gives you a 9.4 damage multiplier from Sparks and Crits

Going for his Crit buff and using the remaining points on his first Spark buff gives you

1.5 base Spark multiplier   .5 from Batootha   .5 from ES   .5 from SP   1.2 from SBB   .5 Crit from ES   .5 Crit from SP   1.5 base Crit multiplier.

4.2 Spark multiplier multiplied by 2.5 Crit multiplier gives you 10.6 damage multiplier from Sparks and Crits.

Of course Crit resistance comes into play, but that's why I'm raising a second Eze. And who knows? Maybe Spark damage might end up getting resisted as well in all later content.