The Ori are probably one of the few raes that could succesful or at least to a stalmate fight the wraith. Doing so would likly lead to saving many humans in that ori have the power to protect plantes of their follows, see Langara. This would also split up Ori resources in the milky way and probably lead to heavy damage to wraith strength. On the other hand the Ori could sudo elevate the wraith into warrors for their goal to use against world whos population dosnt worship them. They also have the ability to give the wraith, if they choose to, improved power generation, their primary weakness.
Do you think they should have introduced them, what do you think the result would have been?