MDB Question

The only thing I have an MDB set for is Citadel Buster...with Shell V how much MDB do I need to cap my MDB with Shell V on?

Also this is my Current set for MDB:
IR Lance
Lamian Kaman (Can't justify 950k for another +1 MDB)
Full Iron Ram
Lamia Mantle +1

Going to get the waist that has +2, and also that ring with +2.

What would be better in this set, the Mantle for +4MDB, or a Resentment Cape for -5%Magic dmg?

MDB doesn't cap

Magic damage Taken does @ 50% MDT

Shell V is ~25% (depending on merits)

So you need ~25% MDT in gear to reach the cap.

MDT > MDB assuming roughly equal amounts of both (1% MDT is a greater reduction than 1 MDB). So the Cape is better than the mantle (so long as the cape is active).

To stick true to the 'rules' you should equip to 25% MDT then fill other slots with MDB, but Iron Ram confuses that a little.

Its better to cap your Magic Damage Taken before putting on MDB gears.

What I use is:

IR Lance-10%MDT
IR full set
Resentment Cape -5%MDT
Merman Earring @2(each -2% MDT)
Merman Ring @1(each -4% MDT)
Resolute Belt +2 MDB
Lamia Kaman +1 or regular +1-2 MDB

Thats 25% MDT......if a whm has 5/5 Shellra V merits thats 25% MDT
I believe 3/5 Shellra V is 23% MDT if I remember correctly.

So depending on who my whm is and their merits I can take off my earrings or one ring and put HP+ in that slot.