i always hear that stacking items gives diminishing returns and i have noticed that with CD reduction and attack speed throughout my gaming but how would it work with these items lets say i got 3 ROA how much health mana and ap would i get from 1st 2nd and 3rd at end of the game. what about 1st 2nd and 3rd archangel.

the first archangel (full charged) gets u 1k mana. 2nd and 3rd give 250 mana each. 2nd and 3rd do not give 3% mana->ap bonus

same with roa. the base stats stack, but the "unique passive" only works on the first one

thank you

so lets say im singed and i get 3 archangels i can charge them all up to 1000 mana for 3000+ mana? wich would give me an extra 300AP?

roa has no unique passive, other then the sustain