Penance brand spreads to nearby enemies, are those enemies the only ones affected by the pulses and ending explosion? If not, what's the point of the energy spread?
Also, will the energy from separate brands which have linked to the same enemy stack?
Edit: Also, with Holy conquest, will the brands detach if there are no new enemies in range?
When the brand is removed from the branded enemy, all energy on all enemies that have energy from that brand will explode. Spreading means those lower-energy enemies will also do lower-energy explosions when the brand is removed, alongside the branded enemy doing a (probably) bigger explosion of energy.