It is running pretty stable, although I had some invalid shares recently. I would like you to focus on the both Gigabyte Vega 64 (flashed both as Vega 56).
I hate these cards for mining, because they are horribly not effective. I keep it short: I want to replace both for a better card / for better cards.
Here in Germany, you can get about 500€ per Gigabyte card, so the question is:
Sell both cards and get approx. 1000€ to spend in a new card / cards.