DDD is only good if you plan around it
I feel like people seem to have this idea that DDD is a god tier cone that is a must pickup and are just going all in on the LC banner. DDD is only good if you're using it to squeeze out an extra action that you otherwise wouldn't have.
Say you're doing PF and your characters have the classic 134 speed. A normal build and you want to get the best score you can in the 4 cycles. You're getting 7.33 actions in the 4 PF cycles. You'd need 3 s5 DDD procs to get an extra action. If you can't ult 3 times on the DDD holder, it literally does nothing for you here, you could have just not equipped a LC.
0-cyclers love DDD because speed-tuning your characters so that you get an extra action in the first cycle is huge. Most characters can only get 2 actions so a 3rd one is at least 50% more damage, maybe more if you can get an extra ult off.
TLDR: don't go all in on the LC banner to pull DDD just because people say it's good. It's a very good LC but you need to plan your team rotation around it.