How would that even work? If it raised the drop rate of dring, it would have to decrease the chance of pixie earring. Why would TH lower the drop rate of anything? TH doesn't discriminate like that. Even if it had an effect, only one of them can drop, so the increase to both would just cancel each other out.
I'm so glad i got my dring 1/2, with 2/2 on hq pop. I so did not want to farm that thing.