For those of you who don't know, shen and soraka take a TON of map awareness
Having global heal/shield ults you have to watch everyone's health AND what they're doing, if they leaped into a 1v5 im not gonna ult them if theres no chance, if it's a 1v1 or 1v2 ill ult if i know they can win, so i have to look around the map constantly all while watching my adc or enemy laner or jg monsters, etc etc. just thought i'd let you non shen/raka players know that.