"Heritages modify your personal tier rating, for the few scenarios where it matters. If the listed prices of the perks you've bought for any one heritage add up to more than 7 credits, you're T4; 14, T5; 31, T6; 70, T7; 141, T8; 316, T9; and 707, T10. If you use a T11 ticket on any Heritage's capstone perk, you'll become a T11 yourself."