I have some power builds and ideas here.
[] Shaman
-[] Thinker 100. Can talk to the deceased by calling up their spirit (either a post-cog reconstruction or actual soul (I would not be surprised if the entities can fuck with souls if they exist)), this is done through going to the location they died, using a piece of the body of the deceased or a precious item. Spirits can share memories and senses with the host if they so wish allowing scouting and increased understanding between host and spirit.
--[] Shaker Assist power: Can make the spirit visible and audible, but not corporeal.
-[] Trump 50. The host can synchronize with spirits they summon, allowing them to use the skills of the deceased. This can be done with multiple spirits with no upper limit, but dependent on host and spirits cooperating with each other, if a spirit is uncooperative the host will have to compensate for their lack of assistance (Basically the host can either get help with the synchro form the spirits, if they don't they will have to do it completely by themself splitting their attention, cooperative spirits can compensate for uncooperative ones). In a willing synchro the spirits thoughts and memories will be completely open to the host and vice versa (This is done to actually make a willing synchro something not as easy as befriending a spirit, there will need to be actual trust or extentuating circumstances).
-[] Trump 100, Striker 50. Spirits can be infused into compatible items (items of significant value to the spirit) giving the item a power based on the item, spirit and compatibility with between item and spirit, this will take a lot of effort dependent on the hosts familiarity with the spirit (So a spirit the host is very familiar with can be infused without taking a lot of time, but a spirit the host is unfamiliar with would take a decent amount of time). An infused item can synchronize with a wielder of said item the same way the host can with spirits in general, synchro between item and wielder can have an effect on the power of the item, some wielders will make the power weaker if they are not a good match (up to the power not being possible to use at all) or if the compatibility is high will increase the power's strength (As you might imagine, if the spirit and wielder is synching a lot their compatibility will get higher over time).
--[] Trump Assist Power: The spirit in the item can disenchant themselves if they want to, the host can do this too at touch range, concerted effort is needed to disenchant and item so no battle disenchants.
The shaman power is mostly inspired by shamans from Shaman King, but is also a power that allows for rezzing someone if they were to be infused into a clone, a person or a body they are compatible with (if someone want to be a dragon, they can).
Also
@Vhalidictes what is the state of metaphysical realms in this universe, Wildbow was not interested in talking about it since it is not relevant to the story he told. So are there any astral planes, afterlives, souls in your quest. I am mostly asking since I would not be surprised if the entities had cracked psionics, magic and souls if they exists (Having a soul is only comforting until someone figures out how to turn souls into an energy source (FMA)).
[] Detective
-[] Thinker 150, Striker 50. Touch based psychometry, allows host to gather information on an item, location or person they are in physical contact with, allowing them to get an analysis of the target and information from its history. The host can mimic the information that they gather from their power (Allows them to use the skills previous wielders, reenact a situation they have gathered from a location, or to mimic a person they have been in contact with for a short while)
The detective power is more or less designed to be given to an investigator and I hope that we will be able to get a host that is on the force or part of an organization that will put their skills and power to good use. Also, if the host gets high mastery of the power they should be able to do touch-based mind reading.
I also have a proposal that is not based on giving a host power, but instead us using a master effect to affect a large populace. I propose that we zap a town with an effect that will give every inhabitant in the town the urge to build things, this will be a one time thing and not a field. I also want us to not give any of them any tinker powers, I would mostly just want to see what thousands of people would build and invent if you gave them a tinker urge without a power. I came up with this when I was thinking about how few worm fanfics have non-tinkers make homemade devices, I find that weird since a regular person could make a lot of gadgets that would be helpful without alien tech (you don't need to be the most dedicated nerd or an engineer to make a tracker for example)