You should always build Morellonomicon instead of Liandry's Torment, even as DOT mage.

You could buy both, but when the time you consider which you should build first, or build only one of them, this is the time for math to kick in.

Gold cost : 3000 cheaper than 3100 Ap + Hp: Same. 15 magic pen: +12.5% more magic damage against chamption has 35 magic resist (early game) 2% damage per stack, at 5 stack + 10% damage. Requires 5 secs of combat. (so what im saying is even with full stack, still deal less damage than WHY???)

( deal more damage than when target has less than **65 magic resist, and 108.3 **when you already have (I wonder if tank ever build more than 2 magic resist item to make this happen anymore)) => better early game, better bust, stack better with other magic pen items (which, you are going to build anyway).

-40% healing vs deal 1% max heal. If you ask me what is more strong, consider all mask man have part of their rune and lifesteal to be considered as healing, and lots of ~~tank ~~ tanky champions with high max health have healing in their kit , i will say is better than .

combo. Yes, it sound and feel strong, but answer me, can you, or the champion you are dealing with, live longer than 5 secs in this meta? Instead, try combo (annoying debuff) or (unhealable) is much stronger. Or all 3 of them.