Hmmm. My Websters Collegiate defines wangle, and says it dates back to 1820 in print.
1. To extricate oneself .....
2. To resort to trickery or devious means...to get the desired result.
3. To adjust or manipulate ...for personal....or fraudulent....means.

Blag not yet in Webster's, but I would guess, from posts here, that it soon will be.

wrangle
1. 14th C.- to engage in argument or controversy
2. to herd and care for livestock....