15k lifetime is not bad, but could be better. But you know, tyre wear depends on several parameters, not only on tyre compound. Same tyres perform different for each driver.

This tyre recommendations are also so personal. Expectations and experiences always differ from each other. There is no single solution for it.

I would also recommend you to check the links phil_rs posted. There are alternatives better than Toyo out there.

For me, I can only rate and recommend you the tyres I'm currently using.
My tyres are Lassa Impetus Sport and am happy with them.