If you wanna onetrick, make sure you also are good at at least one other very similar champion or hard counter to the first that has very low pick/ban, and preferably a third, and are competent in a safe pick or two for a secondary role. For example, my main is
, secondary is
(which is awesome, since Nami has a great winrate against Soraka, isn't as popular, and is extremely similar in playstyle). So, if Soraka's picked or banned, I can still do really well. That's how I climbed to gold this season with relatively few games. It becomes unlikely that BOTH your top two are picked or banned, but it can happen, especially if your a hypercarry kind of player (which is honestly a good idea.) Then you may have to be very good at several champions (so
,
, AND
).
If you onetrick a multi-role champ like
, you can keep playing a champ you're good at in your main and secondary roles.
Make sure your champ is both fun and fits your playstyle. Typically, your favorite champ will be your favorite champ because they fit your playstyle, even if you don't consciously think about it.