Elixers are used for quick power spikes. Economically, they're one of the best items you can buy for a quick boost. You typically get it for when you're either a) having trouble staying in lane because of harass, or b) want a quick boost for an upcoming event (baron, dragon etc.) but don't have the gold or room to buy another item.
That's when you should get elixers. Any other time and it's starting to reach overkill, which is a waste of gold.
You also buy red elixir on manaless ad casters at top lane.
red elixir 4 pots 1 ward.
I just failed to carry a game. I denied Yorick cs and killed him 2 times in laning phase as Jayce. Then there was a 20 minute teamfight in mid lane. All my team was feeding but with muramana I poked the shit out of the enemy team. We won couple of teamfights when being behind. I couldn't go for any minions cause my team kept pushing and got killed so I had to join them. Miss Fortune was fed as fuck and nobody was focusing her. I managed to infiltrate their jungle and kill Lux while they rushed for my team. Probably would have been an easy win but my team fucked up again. We literally had no wards. Had to buy them myself. My team kept overextending and they completely threw the game by dying when pushing or facechecking. Aaaaand my win streak ended 5:1. Getting out of Silver will be hard.
Also I got a penta with Jayce after I downloaded lolrecorder. That was perfect timing.
Master yi
My latest match
Master yi
SO far I have purchased 5 champions
Master yi
Garen
Allistar
Twisted fate
Some long "t" name