Best Supp To Play While Smurfing

I'm a d4 smurf, due to the fact that my old acc got temp banned due to afk (there was a snowstorm and my dumbass decided to play, lost connection in someones promos). I got up, placed myself in bronze deliberately, and tried to have fun. however, i'm normally used to playing champions like thresh, sona, nami, soraka, etc (the ones the help the adc when they inevitably fuck up). Now, when i try this in bronze2....interesting things happen

a) the adc gets cocky since i shielded/healed, overextends, dies b) adc doesn't know how to use my abilities (like nami/sona's e, thresh lantern, etc) and completely wastes the ability c) doesn't know my champion (i had a iron4 jinx tell me not to poke.....as sona. With eye of the watchers. d) when i get tired of my adc's bullshit and build one non-supp item i get flamed to shit e) adc dies, i take like 5 cs in farm when they are out of lane to not waste gold, get spam pinged f) adc messes up my attempts at wave control, like pushing or freezing

i still like playing supp however, so what's a supp champ that me playing in low elo will most likely not lead to these situations.