Fiora is a very good at starting the team fights because you can lunge over to the enemy and quickly bust them down.when your team is starting to tetreat and the enemy team doesn't back down you can ult so you not able to be targeted. Since they are trying to figure out what is happening your team can come back in and finish the fight.

My favorite thing to do with fiora is once you hit level three with fiora u have pretty much free poke. My favorite thing to do is lunge to the enemy with my riposte activated and her burst of speed and lunge one more time to deal that extra damage. Once you hit level six u can do that same combo then use your blade waltz to turret dive them since the turret can't target you

With your passive if you just killed someone and you are ignited instead of running and dying from ignite you can it the minions to activate your passive which increases your health regain if you are attacking something

Farming with fiora is very easy considering the fact that once you have your tiamat people get mad because they can't get any minion kills. You can also activate your e which is your burst of speed which clears the minion wave faster.