In my experience BLUs tend to actually kill those skillchains for other DDs making them top DDs in party with their CdC spammage but then with the same support abd other DDs when I remove the BLU the mob starts dropping faster.

But this is only with the typical BLU that only knows to spam CdC and don't even want to participate in another skillchain. Normally when I play with this kind of BLUs my damage drops to 33% but they don't really care because theirs is slightly better.

When you play with real BLUs, those who can actually do more than CdC spam, they are at the level of a real DD, and they are also increasing your damage because MG is a really cool buff.

But yeah I remember once fighting with a BLU that couldn't use a Requiescat once every 1.5 minutes (Climactic Flourish recast) on that ambuscade boss that was only weak to piercing just to open darkness for my 50k rudra +99k sc because he was too busy spamming 3k CdC.