Revives can be found in different quests throughout the story mode, although not 100% guaranteed. Best way would be solo events (level up, hero use etc) you get revives and units both through that. Best of luck.
We don't speak of revive farming... As kabam then take it away.Units from arena/battle chips & Lower level EQ
Because kabam frowns on farmers! But play the daily t4b quest. There are a few there. Or fight as deep into realm of legends as you can without using any! Some of those champs will drop revives and restores.
Farming revives is easy!!!! Just go to story mode quest 4.1.6 more often than not there will be one somewhere on this map... even if there isn't just complete 1 lane (all the way complete as in defeat the boss) then go back in and look again. The map items will be new and more than likely that green ball of goodness will be there waiting for you to devour! You're welcome.