help me understand sennas new itembuild
didnt play her for ~ 1 week and suddenly she goes tear, runaans and full lethality. why? runaans makes sense. but why tear? people told me because she has high mana cost... well by that logic amumu should get a tear aswell his ult on lv 3 costs 200 mana and he doesnt even reach 1k mana total. lethality why? with ie her crit is almost a regular 200% crit. and imo thats way better considering she gets to 100% with just ie.
why do ppl go
"cause healing reduction is good" again, yes but not every mage goes morellos. and lord dominiks penetrates more.
ppl go ghostblade over duskblade... WHY!? doesnt her bonus ms from aa make you happy enough?
but for real please help me understand this new senna build.