This post is just a random musing, but here goes.
We know that SG1 has used time travel to harvest a ZPM. They could have used time travel to help cure the Asgard of the Asgard's Replicator problem and the Asgard's cloning problem.
Here's the steps:
1) Travel to the past on some safe planet like Cimmeria
2) Make contact with Thor on Cimmeria
3) Tell them about the location of the two Ancient libraries of knowledge
and offer to be conduit
4) Be placed in an Asgard stasis chamber and develop the ARW
5) Use the library to fix the Asgard genetic code
6) The Asgard owe the Tau'ri now and will use their military might to decimate the Go'uld and elevate the Tau'ri to Asgard status