Is it an unwritten rule for every team to consist of at least one tank?
Though i must admit, teams where there is a good tank actually can control the tide of the game.
If you're a melee character you better have a pretty good HP pool.
You don't *need* to have a character defined as a tank, like Shen/Nautilus/Malph or whoever.
But you will need someone who builds tanky, which nowadays is usually the jungler. Someone who can take some punishment, but importantly has enough CC or damage to disrupt their team.
Ideally top will be an offtank too.
If both teams are equally skill, yes.
If one team is way better and has no tank, it can still faceroll the other team.
Spoiler is plot element, not your ignorance.
I feel like having a tank makes things much easier for that team, but it's not necessary.
Now Playing: BL2, TF2, LoL
i5-3570k | Corsair Vengeance 8GB 1600MHz RAM | EVGA GeForce GTX670 FTW | Asus P8Z77-V LK | Western Digital 7200RPM 1TB HDD
You could do a pure damage/face roll assassin comp and have it work well. Even in late game where the tanks are in their prime, what good do they do if you've assassinated all the enemy damage dealers and all they have left is one or two tanky peelers that couldn't simultaneously peel FIVE assassins?
The problem is getting there. Its high risk high reward. If you get crushed in lanes or are just a little behind, it can be very difficult to fight a team fight. At those points you have to start depending on picking people off, while the enemy team with a solid composition containing a tank can just group and siege your turrets with no problem. Objectives win games more than kills, unless you're getting a ridiculous amount of those kills.
Can a comp work without a tank? Certainly. Absolutely. Is it ideal for every situation? No way.
I have been in games whereby people demand that one person pick a tank hero.
And i have been in games where some melee must be tanky.
In ranked matches, must someone be tank?
Can't be banned for not picking a tank, if that's what you're asking. People simply look for optimal setups in ranked, to increase the chance of winning, so they follow the meta which usually includes a tanky champ for initiation/peel.
In solo queue especially, you would be hurting your team if you are last pick, going top, and you pick teemo or some other squishy BS champion. While the rest of your team is all squishy assassins or some other BS.
You ask yourself. Are you playing to win, or are you playing just to play? If you are playing to win, sometimes you have to think about doing things that would benefit your team more than your own pathetic KDA.
Generally, yeah. You can win without a tank, but you'd need to have enough CC to peel the enemy bruisers off of your carries, have some way to initiate fights, and have everyone build enough defensive items to survive in fights. It's much easier to just have a tank, especially outside of a premade team.