I think that six more new tires will be enough for this season. Next year all new again except maybe these four full wet tires because we rarely have full wet special stages (but we had first full day on those rally in 2020 when we finished 3rd in our class). As you said, new tires can save you very much! And this car destroy rubber much more then our cars from before. It's just much more powerful and it has LSD and sequential gearbox and that means much more pressure on rubber. :)