Exploit
Warding bond persists even if you have withers completly get rid of the hirelinv . Meaning you have warding bond even tho there is no-one to recieve the redirected damage, so it cant wear off till you long rest. I make a cleric cast warding bond on all four of my party, then have withers dismiss him to camp and then get rid of him entirely and go adventuring . Rehire the same hireling at the end of the day and repeat after resting.