If you were unsure of the starting Posture (Position in Blades) would you use the Engagement Roll from Blades or perhaps make do with the Oracle 2 "how strong?" check? Some guidance on this in the tips & options section would be good I think.
I think the thing that threw me off a little bit is that Oracle 2 seems patterned in someway off the Fortune Roll but the wording is a little different. The Fortune Roll assumes that a high result (6, critical) is in the player's favor and each tier lower is less favorable. Depending on how you "ask" Oracle 2 your question a high result might be really bad for your character - so - it just takes a moment to think about how to frame the question.