User blog comment:CharmingCharlie1/LR Black & Zamasu. Is it true that it's still the best LR? I don't think so./@comment-32151319-20190204102112/@comment-33537296-20190204110630

It gets in the way in such a way, that in later phases (> 6 turns) LR Black & Zamasu are probably stacked in terms of DEF thus tanky. Assuming that LR Gogeta & Vegeta are in neighbour rotation, LR Black & Zamasu will heal the team, then tank attacks, preventing Gogeta & Vegeta to perform Potara Fusion (As HP will get higher)