Ultimate sump ideas?

[Milad]

hey guys, i was going to build a massive sump using 100 or 150gallon water troughs. i was looking at doing 3 troughs

before i start modeling it i wanted to get some ideas from people on sump design.
ive been reading up on
remote DSB
mangroves
refuge
pod havens
water change volume

the idea right now i have in my head is to have one container for refuge/coepod haven with mantis maybe, one for return (maybe frag area), one for skimmer, reactors, etc.

since im using biopellets it looks like the mangrove idea might not be a good one? i was also going to add a 33g container for quick water changes.

im hoping to get added nutrient removal and a place to put extra live rock which is in my DT (i have way too much).
so what would you make sure you have in your ultimate sump?