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 | 19,410 | 23,710 | 28,110 |
| 20 | 21,600 | 26,370 | 31,270 |
| 40 | 22,400 | 27,360 | 32,440 |
| 60 | 23,090 | 28,190 | 33,430 |
| 80 | 23,690 | 28,930 | 34,300 |
| 100 | 24,250 | 29,610 | 35,110 |
| 120 | 24,760 | 30,240 | 35,860 |
| 140 | 25,260 | 30,840 | 36,570 |
| 160 | 25,720 | 31,410 | 37,240 |
| 180 | 26,170 | 31,960 | 37,890 |
| 200 | 26,600 | 32,480 | 38,520 |
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.