It's currently not possible to test combinations of more than 2 upgrades against target dummies.
It would be nice if it was.
#Make it possible to test 9 ordeal weapon upgrade combinations outside runs
thorn crest
keen bluff
Additionally, there's a bug where equipping all nine Ordeals doesn't unlock all the upgrades. Your inventory will show you have them all, but when you check the upgrade wheel, one is missing. This is because one of the upgrades is "duplicated." It's not that the effect stacks twice; the system simply places the same upgrade twice, preventing the sixth upgrade from appearing. Of all the times I've played with nine Ordeals, I've only gotten all six without any duplicates once.
empty chasm
Aside from weapon upgrades i wish it was possible to properly test what relics do.
Instead of the training dummies in darkwoods, I would suggest a seperate instance in the "Training" area. They already have the capability to reward us with relics and spawn enemies in there. I would like a room that leaves us alone with dummies, and the ability to select any combination of perks, relics, and upgrades, for the sake of testing.
Most players dont understand how things work, or how damage adds up. This would help a lot, at least for those who are interested.