A while back I told @Honorless that I was going to make another of my trademark Radiant Oath Theories about Willshaper Oaths. Additionally the next SA book is going to be about Willshapers so I think doing this is a good idea.
For those of you who don't know I believe that Radiant Oaths (with the exception of Lightweavers) follow a pattern. The first ideal is constant, the second is about service, the third is about fairness, the fourth is about trust and the fifth is about the ultimate goal. This belief fuels all of my oath theories.
Keep in mind that Willshapers are the order we know least about. We have never even seen an active Willshaper in action unless you count Venli and to this day there remains some confusion about what surges they have so this is probably going to have much more speculation then any other similar theory.
The first ideal for Willshapers is of course the same "Life before death, strength before weakness, journey before destination." This is always the first ideal. After this however we have to speculate.
The second ideal for Willshapers will almost certainly involve what the Willshaper order is supposed to do for others. Thanks to the as yet unknown author of Words of Radiance we know that Willshapers varied greatly in terms of personality but they were know for a "love of adventure, novelty, or oddity." This reminds me of the tinker that our hero meets on the road, a wacky old man who loves the strangest things but at the same time(key point) always has exactly what our adventurer needs to succeed on there quest. As such I think that the second ideal of the Willshapers is "I will bring newness to those who need it."
EDIT AS OF BRANDON QUIZ AND RADIANT INFO DUMP. I think I want to revise this one and make it "I will help people find what they need." This is both more general and incorporates @Schadnathan's theory and work. To take things one step further in our old crazy tinker metaphor the items that the adventurer is given inform "his" approach. A weapon might give added courage, invisibility might make our overconfident friend more sneaky. A pretty gift might encourage the adventurer to try a social solution first. A willshaper's job is to inform and aid the decision making of the people around them. They are not known as odd just because they are carried away, like to travel, and know really obscure bits of trivia. They also are constantly trying new things and getting others to do the same.
I think this covers service fairly well. When a you need a new way of doing things or a device that can help you reach your goal you call your Willshaper. This is great but it may lead to a problem. What happens if your Willshaper gets carried away? What happens when they invent the atomic bomb or biological warfare? The history of science is rife with humans using new technologies to hurt kill or torture each other. Venli herself ended her people because she did not care about the actual results of her new form of power. As such I think that the third ideal of Willshapers is "I will think of the results of my creations before creating them."
Once we have finished the third ideal the Willshaper can aid their community and we can all sleep a little easier knowing that they are not working on a way to devolve humans back into chimpanzees. However genius does not happen in a vacuum. To be truly effective an inventor has to rely on their fellows work. This is something Brandon clearly knows(imagine if he tried to check continuity and do research on all topics himself). A Willshaper has to be able to work with others. They have to rely on ideas that they don't fully understand and except it when someone points out a potential flaw in their new theory. As such I think that the fourth ideal for a Willshaper is "I will trust the work and concerns of others."
This gives us four nice ideals to play with. Our Willshaper makes good stuff that won't kill us or turn our food into weird tasteless pastes. They can cooperate and think and work in teams. However they don't yet grasp the point of invention. More or newer is not the same as better. Invention should fix problems and make life easier. As such I think the final ideal of a Willshaper is a simple "I will work for them not for me."
PS I have a bonus in the works where I point out where in SA 4 I think Venli will swear each oath. I will post it below latter. Also my pattern of radiant oaths theory can be found below.