Basically boils down to "don't think you need to get Astrodyne's 3 different seals or your raid will fail." It's very much so flavor.

As for Sleeve Draw's Lord/Lady, you basically put it on cooldown, holding the card for the best possible timing within the skills' window to use before sleeve draw comes back down on cooldown (basically a bit of optimization there for healing any mistakes with Lady or holding Lord if raid buffs happen right before next activation).

I'm actually quite curious now, if you draw Lord/Lady, would it be more beneficial to just wait and hold Lord of Crowns in raid buffs since you can't guarantee if you get unlucky and draw multiple Lady of Crowns in a row? Or do you just chance it for RNG? In a farm party, the illusion of choice in me tells me not using the skill on cooldown would be folly for the tradeoff to be a small DPS gain under raid buffs, but getting RNG for multiple rolls of Lady of Crowns is still possible, and thus would be even less DPS when you don't need the extra healing. Decisions, Decisions...