Vetta I'd say Rave. Acheron is weaker in Mv, while he's strong in all three of her weaknesses. It's hard to say on a glass since neither of them have too much training, but maybe Hrt since that's Rave's weakest trait and affects two disciplines unlike her weakest trait of Int.
Tasi - it looks ok, but i personally would be a bit worried about hrt, scp and spd as they are both mediocre of them, the foal would also be extremely strong in str.