SCH DPS > SMN DPS?

[Sapphidia]

In identical level gear, a Scholar should do 10% more dps than a Summoner if both classes use -equivalent spells-. That is, a Scholar's Bio, Miasma, Bio 2 and Ruins should hit 10% harder than a Summoner's. This assumes that a Scholar in good gear can get basically the same Mind as a Summoner can get Int, and then using Cleric Stance to swap them for 10% extra damage.

The difference of course is a.) the pet's dps, b.) swapping Energy Drain for Fester, c.) extra Ruins due to Contagion allowing less dot casts and d.) Raging Strikes as a DPS cooldown.

You have to compare those with Selene's cast/attack speed buff. There's no way a Scholar will be able to out-dps a Summoner in equivalent gear, but a Scholar can definitely contribute incredibly significant DPS to a party in situations they arent required to spam heal. I'd wager OPs friend is napkin-mathing the 10% boost from Cleric Stance and isnt aware of just how much damage Pet/Contagion/Fester actually adds.

EDIT - just checked on my 50 Arcanist. Both of my Scholar and Summoner have basically identical gear but with mind/int swapped (eg, garuda weapons, strategos vs demagogue etc), and I run a 15/15 Mind/Int stat setup as it's not my main. Thus, both classes have identical amounts of Int and Mind respectively on their gear. My Summoner has 391 Int, my Scholar has 376 Mind. The extra int comes from the +12 total from Enhanced Intelligence Traits, and I think 3 difference on base stats + Soul Crystal.

So a Summoner will always have +15 Int more than an equal geared Scholar has Mind, which should equate to less of a damage boost than a flat 10% from Cleric Stance. Don't forget in testing that spells have variable values. My ruins hit the same target anywhere from 150 to 170 damage varying. Swapping between Cleric'd Scholar and Summoner, I'm seeing next to no noticeable difference in the power levels of the spells.

So TLDR - Summoner and Scholar do about the same DPS if you don't factor in the Pet, Raging Strikes, Fester and Contagion. How much more DPS a Summoner brings to the party is about comparing those 4 DPS sources with how much total party DPS Selene's speedbuffs add, which will vary based on party size/composition/gearing.