[renowner]

My own thoughts:
I certainly agree that duelist often feels railroaded into ghost simply because firebird requires a spear and kensei requires a katana. Ghost is an extremely strong class however so it isn't often a big deal. But being able to actually choose from more than just one option would feel better. The same issue magic gunner basically has.

I do agree the spells hp drain should be lowered a bit. Or at least should be able to have a choice of passives like Shapeshifter does to lower the drain or not. Twister can do nutty things, but so can cyclone spear if you're talvyd enchanted.

I Think Dark imbue is honestly fine. I think Sanguine star could be reduced to 3 momentum for sure.

Reaper scythe is great. It doesn't remove claret calls unlike most things. . . It just makes them unmarkable until your next turn, which isn't a big deal. Its not a basic attack but its still pretty good.
Cut down and Ghastly strike I Think are also fine. Not everything has to be nutty.
And Ether Invitation costing 4m is healthy. Means using it requires choice and it usually becomes the only real thing you do that turn. Which is good. . Since it can easily hit several hundred to even a thousand damage or two when combined with excel weapons and criticals.

Something not mentioned here however is that dark gaze is absolutely terrible. It needs to not erase all of your claret calls. There is no reason to ever use it over EI or Last Chance. Never. Silence isn't even hard to remove for most races/classes these days.