I just couldn't carry my team. I was first full build out of all 10 players by 10 minutes or at very least 5. I was the only won lane on my team. I had sustain damage BUT I'd be focused down. The other enemy titan, nasus was tankier than I was and could also dish out a lot to everyone including me. Who scales so hard they can almost 1 v 5?
Khell DarkWolf2 votesYou had no boots and had Wota. Wota is bad on Cass
In this scenario I would have gone RoA instead of Arch angels, Ditch Death cap for Morellos tome and ditch rylais for Liandries so I can help melt the raid boss.
Ult if a wild Rengar appears.
BlackTh0ughtz1 votesWotA gives cass amazing spell vamp. Her E can heal for about 200 per shot. It really helps in keeping her alive.
Captain Aishi2 votesnot when you get bursted down at the start of fights, in which case surviving the burst with RoA is much more essential
Roaranor2 votesIf you got focused down, then that has nothing to do with your scaling lol. That just means you weren't in a position where you could dish out damage without getting killed. Whether that be the fault of you or your team idk. The difference between you and Nasus is that he's a tank that belongs on the front lines soaking up damage and trying to get the enemy to focus him, and you belong behind someone dealing damage from a safe-ish distance. That holds true for all mages (with very few exceptions).
Moulin Rouge1 votesWell, with a good group Orianna scales just as well. Providing higher burst and decent sustained dps. As well as higher utility.
Problem is in soloq no one realizes Orianna gives you a team fight advantage so her strengths go out the door.
Kowe The Ewok1 votesNobody can 1v5. But Leblanc is really good at picking of enemies at very low intervalls (see Fakers Penta earlier this weak). Xerath does well in terms for AoE damage. Anivia does well since she can splitt the enemy team.
But for raw DPS? Cass.
Kat Head1 votesLand a good ultimate and you can 1 v 5 with 
.
DoraTheBrown1 votesmagic
Captain Aishi1 voteskarthus is a mage with tons of damage that can still do his job decently if he gets focused first in a fight anivia has tons of damage and enough zone control to be very hard to jump on and focus down first (that's my go-to 'let's 1v5 these guys' champ) katarina can make or break a game (much more high risk though due to being melee with no CC at all, can't stall out games for your team with waveclear if you're the only one fed) Syndra can be a pretty hard carry champ that's harder to reach than cassi
(my main midlaners are anivia, katarina, cassio and syndra btw)
Be Kind Rewind1 votesFirst I grab a tear, and leave it until late-game. 
Then I like getting Rylai's early on her for the perma-slow on her E as well as the much needed health for her mid-short ranged rapidfire fighting style, 
Then getting Sorc Boots and Haunting Guise, an extra 30 Magic Pen: Combined with my runes I can have anywhere from 40-50 Magic pen by this point already, meaning you're dealing true damage to mostly anyone not itemizing against you. 
Haunting Guise can then be left alone until later or rushed into a Liandry's Torment, which synchronizes well with her melting poison damage as well as doing double passive-damage due to the constant Rylai's slow. The extra HP (combined with Rylai's HP) also gives you a good bit of survivability, which, again, is vital on Cassiopeia. 
After that, if your enemies aren't already taking true damage, you can get Void staff - you could build tear into Seraph's, for more AP and survivability, or even a Zhonya's just for survivability - or if you're feeling like it, you can go straight for Rabadon's to double-stack with your passive's % bonus AP, then finish Seraph's Embrace. Gives you inescapability early, makes you essentially impossible to itemize against, and gives you massive AP spikes late-game - not to mention plenty of HP early-mid game for survivability.
Final Item:
or 
Hasztalan21 votes
