Champion Skills Combinations

Hi Guys

I just wanted to hear your thoughts on champion ability combinations. As an example i will take fiddlesticks and Janna.

Im not too sure if this will need to be an item that you purchase in order for your abilities to combine. I have noticed something in league, the support or tanky classes often have a ranged ability that does little to no damage so with a combined attack, you may be able to do a bit more damage (maybe 60% of the more powerful attack).

Hear me out, If fiddles and Janna happened to be in a lane together for some reason and Janna started her Tornado, Would it make sense for Fiddle to throw his Dark Storm ("E") onto the tornado so that when that Tornado hits the first champion the Dark Storm would be released from the Tornado.

The Dark Storm would only do 60% of its original damage when it is in effect.

Lets look at a few more,

J4 with Soraka...

Lets be honest, J4's Demacian Standard does little to no damage, it's great for catching and knocking up but if it had a bit more use it could be a more effective ability.

If Soraka had to somehow cast her Equinox onto Jarvan, His next Demacian Standard would silence those that are in the radius of Jarvan's Demacian Standard .

I know combinations like Bards Magical Journey and Nidalee's Spear would be very annoying, Just like the combination of a Teemo and Thresh, With Teemo giving Thresh the ability to blind on his next hook.

But I think the combinations would be endless and some a bit OP.

It will be interesting to hear what combinations you guys think will be a good/bad idea and if this idea would be usefull at all.

Have a great day!