Friends
- All Champions gain +[130] Armor Rating.

Every sig anchor × rank at A0. Sig levels in between interpolate smoothly (PCHIP) and round to the nearest 10 BHR — matching the in-game display.
| Sig | R3 | R4 | R5 |
|---|---|---|---|
| 0 | 18,350 | 22,410 | 26,570 |
| 20 | 22,820 | 27,880 | 33,040 |
| 40 | 23,510 | 28,720 | 34,040 |
| 60 | 24,090 | 29,430 | 34,880 |
| 80 | 24,610 | 30,060 | 35,630 |
| 100 | 25,080 | 30,630 | 36,310 |
| 120 | 25,520 | 31,170 | 36,950 |
| 140 | 25,930 | 31,680 | 37,550 |
| 160 | 26,330 | 32,170 | 38,130 |
| 180 | 26,710 | 32,630 | 38,680 |
| 200 | 27,080 | 33,080 | 39,210 |
BHR at each signature level by rank (non-ascendable — A0 only). The curve is concave — sig 0 → 100 captures roughly two-thirds of the gain from sig 0 → 200.