I think such a high price tag on her tainted her which is unfortunate. Glad you picked up some older strains. I think they offer better highs than the new ones. I have a Lambsbread cut that still blows any hype/new out of the water and she's over 10 years old and free.
For the spider mites I found purecrop1 at 1oz per gallon with an application rate of once a day for a week then every other day for the second week worked or you can use SNS217 which works even quicker but might be a bit harsher on the plants. I use an electric paint sprayer to apply. Hope you can beat them soon.