It is a great time to buy those cards at the moment IMO. There seems to be an oversupply of WOTC since that was the focus of the mass hoard being sent to PSA when papa Paul came onto the scene. I am also picking up more WOTC too since the prices seem very solid especially if you compare to sealed product and even comparing to modern graded.
But more specifically Base 2, 10s have a lower pop overall and like you said appear less often so I would prioritize that set since Base unlimited you can readily find those cards and supply won’t diminish in the future.
If you want more collecting ideas a good place to look through is the various E4 articles and guides.