Definitely don’t use WIlbur with:
- Aegir, Kailani and Gunnar (because they have the same Spirit Link buff)
- Obakan, Boril, Cyprian, Elena, Boss Wolf, Sumitomo (Spirit Link has bad synergy with Riposte)
- Elkanen, Leonidas, Musashi, Graymane, Prisca, Renfeld (Spirit Link has bad synergy with vampiric abilities)
Not recommended to use Wilbur with heroes that give substantially weaker defence buffs, like Victor, because they will overwrite Wilbur’s defence buff.
Use carefully with following elemental defence debuffers: Guardian Panther, Evelyn, Frida, because you’d want to exploit the spirit link along with damage sharing. King Arthur, Guardian Jackal and Guardian Falkon are OK.
Use carefully with Athena, because Athena has a better defence debuff, which has a great synergy with the spirit link. Fire Athena after Wilbur if possible.