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 | 19,570 | 23,910 | 28,340 |
| 20 | 21,670 | 26,470 | 31,380 |
| 40 | 22,490 | 27,470 | 32,570 |
| 60 | 23,180 | 28,310 | 33,560 |
| 80 | 23,790 | 29,060 | 34,450 |
| 100 | 24,350 | 29,740 | 35,260 |
| 120 | 24,880 | 30,380 | 36,020 |
| 140 | 25,370 | 30,980 | 36,730 |
| 160 | 25,840 | 31,560 | 37,410 |
| 180 | 26,280 | 32,110 | 38,060 |
| 200 | 26,720 | 32,640 | 38,690 |
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.