His ectomancy rituals aren't that powerful, though they are better than Harry's. If I wanted to write him up without custom Powers I'd make his rituals better so that he could do fancy stuff like body-sharing through ritual magic.
Agreed.
Well... saying he has "... ectomancy... better than Harry's" isn't saying much, at all! There's a reason that Harry goes to Mort sometimes... Harry's pretty BAD at it (relatively speaking, of course), so when he needs Ectomancy he goes to an expert for help. So how "expert" is Morty, really?
Thing is, it looks like Mort is not merely "better than Harry." Mort is a serious badass, Ectomantically speaking. We know, because Harry isn't our only point of reference and relative power: we also have Corpsetaker, who's scary-good at Ectomantic stuff (probably (at least) Senior-Council good; all the Kemmlerites were BETTER at *necro/ecto/etc* than WCouncil), and Mort seems to be largely in Corpsetaker's weight-class. Looking at the prior discussion, I find myself agreeing with narphoenix & HickJr: Morty's stronger than that write-up (at least, by the end of Ghost Story). Add evothaum, I think, maybe another stunt or two?
Let's revisit that scene, Corpsetaker vs the Molly/Morty tag-team...
At first, it seems like it's just Molly facing Corpsetaker. Molly's doing impressively well defending herself, but is definitively loosing. Corpsetaker seems to be mostly unhurt; maybe a box of stress, maybe a Consequence? Nothing major. Then Molly, as a last-ditch measure, gets Morty involved.
But what kind of resource has Molly called upon? Corpsetaker has been breaking his will down; Morty can't have much left for impressive casting. He's GOT to be on his last legs... only 1 box of stress left, most Consequences taken, etc. Not much there...
And Mort one-shot's her. Granted, he caught her by surprise, but he took her out
in her own specialty with one hit. Granted, it's his specialty too. But when Molly calls him, he stumbles up the stairs *MAYBE* 20-30 sec's later... how long, REALLY, did he have for pure-Thaum prep? His body couldn't have sustained a sprint up those steps, he must have started up pretty much the instant Molly got through to him.
One can go back and forth with the "granted"s and the "and/but's" and in the end, it may come down to a matter of personal interpretation, of novels-as-written and RPG-mechanics to date, etc... But I remain convinced: Mortimer Lindquist is a hardcore badass, in the Ecto/Necro realm.