First: Sry for bad grammar, english isnt my native speech and this is my first guide!

I´d like to play soraka because she is a very nice support and cant get out of mana or health.
And i did love to play champions wrong ^^

The most effective "wrong" build i did yet is sorakas. Soraka should be played as a support and so on but she get much to fast dead. If you play soraka on tank you will be nearly unbeatable because you have skills that regenerate your health and mana for free.

Here are the pros and cons if you play soraka on tank:
Pros

-Unbeatable against caster with low health (because of silence and so on)
-Unlimited Generation of health because of skills and items
-easy jungling
-Fun :D

Contra:

- Hard to start
- Still a easy kill for feedet carrys
- People will call you silly because of you built

My favorite standart for all champs is heal and flash because its perfect for escape.

You can choose ghost aswell. Its helpful like flash to escape or to run into team fights.
Or Clarity if you get out of mana fast.

Jungling:
Soraka is bad for jungling! So dont be stupid and to it at first. After you had bought warmogs you could start with some creeps. At the end of the game or when you had bought 4 items you can jungle as much as you want because you lifegen. will safe you.

Minions:
You should skill you Q skill up because minions will be you main moneymaker. Use you Q skill as often as you can and than do you E skill for regenerating you mana. With this tactik you can kill creeps to the end of the game without losing mana.

To play with Soraka as a tank will make fun but never choose this built in ranked. Its really just for fun and there is a high chance that this built will failure in ranked.

It will be most effective against bots (what else). They will do no dmg at the end you can even tower dive easily.

Thank for readting :D