In the description it says " If the shield is re-cast, it explodes, dealing increased damage". After checking the damage absorption of the skill then I let mobs hit until the shield exploded and in comparision between it and the re-casting was no difference.

The modifier "Prideful Deflagration Effect: Converts base Physical damage to Fire damage." may change the damage source but cannot inflict burning ailment (how about I got the passive allowing to inflict 2 different ailments?) as the result of the explosion. Unlike "Crushing Wall" seems can inflict various ailments.

I expect Juggernaut is the most satisfying skill to build around.