Sorc1 is really good as 1 circle if you going full SPR, the summon deal a lot of damage! a decent geared would be 40k-60k per hit, while marnox is like 40k+ x 2 per hit consistenly, that was enough to compensate the lost of 10% from warlock. Not to mention they provide infinity aggro like swash buckling and help you mitigated lot of damage that was suppose to deal on you.
Warlock1 at the mean time, for me the best thing is invocation and +10% dark damage attribute. As you see, the thauma3warlock1shadow2 is a damage exponential build, a high INT + T10 Staff + high level of Attribute + Chapparition Cards will multiply up the damage to extremely high and potentially hitting 777k damage.
Shadow Conjuration/ORbs if damage is high enough that kill off monster, then it work best with Invocation which dealing 500%x3 per spirit leaving on the ground.
Not to mention this build need INT/SPR to stack together for best thauma buff return and highest base matk scaling with chapparition cards. (be noted chap cards do not scale on thauma buff, so you need high INT/high matk weapon to work best with chap cards, while you need INT/SPR gears to scale thauma buff and compensate your lack of SPR when going full INT), it is pretty much a very demanding high end build.
So as the say, the sorc1 is for beginner/casual/alternate shadowmancer. the warlock1 is for player who main this character since it need a lot of investment.