Nasus is OP 1k Critical Damage!! 

Your answer is in BrokenSupport YT channel, an amazing solo support main and an excellent teacher

Support is a good role to climb up the queue. Since the new pity system I think Support has the greatest chance to get atleast A or S rating which prevents you to fall down in rank. You can follow and watch Broken support channel for more info. That guy is a support main and is cracked af.

It's a really underrated role, you can control the enemy and heal your team or tank for them. There is a channel called broken support check it out

Yeah you can easily reach if you have a good dou or trio

It's possible and it's even the easiest way to climb IMO (enchanter support) but you need a lot of time and effort to learn the game.

Caitlyn ult