Help me with hotkeys for morgana

Hi everyone, before you go on about how I havnt done any research and I want handouts, I have already figured out 1/2 of this problem... Im not exactly sure if the game has the capability to do it, but hopefully someone will know.

this is the issue:

Playing support morgana, or something like zilean, i need to quickly cast blackshield or the zilean ult on myself, or my partner. blitzcrank throws a grab, i dont have time to find him with the cursor, or get it over his portrait, especially if im also trying to hit their adc..

now on to the part ive figured out

self + quick cast, i set skill 3 to a. this means on morgana, if something fires at me, i just hit a, and viola im shielded.

there is a similar option for shielding your duo partner, and ive sort of figured it out. I recently switched to quick cast everything, and it doesnt seem to work with that, however... if you set a normal cast skill 3 to say "s" key, OR if you use the range indicator thing enabled, and hold down the e key, then hit the "select ally x" option that are normally f1-f5, it can work that way. It only seems to target the person if you have the range thing up, like its ready to cast.

so i set select my adc to tab cause its quicker than the fkeys, then if i want to shield my adc, i hit "s" -> "tab"

id like this on 1 key tho..

https://www.youtube.com/watch?v=1QYgSRNFPqY

id also like to direct your attention to this video that proves this kind of thing is possible, except hes ether EXTREMELY quick, or he has a better way of doing it, because i didnt even see any range indicator or normal cast up at all. fast foward the video to 1:20, the part im concerned with is where he sheilds the adc, it happens between 1:20, and 1:35

please help :p, its not a huge issue, but im trying to expand my support pool a little bit so i can start ranked, and this would help me alot Oo.