Not beating around the bush.
Short and Simple. Soraka will carry games, regardless.
Windspeakers KeyStone. Sorted.
Max W -> Q -> E Obviously put points into ult when you can.
Simply build Coin, into Eye of __Whatever coin is__. Ardent Censor, Ionian Boots, Kindle Gem, Either get spirit visage or ohmwrecker with the kindle gem. More AD ->Ohm More AP-> Spirit. Warmogs. Then finally build the other Kindle Gem Item previously mentioned.
GG. Super heals. Super Speed. Ult to gain assists from all over the map. Don't get caught out. Keep wards up, be aggressive and win lane.