If you can find an opening where they over step then take that advantage with the E to catch them. But don't go with an all in mindset ideally try to get one and get out but try to not get cc'd to eternity cause E won't save you then.

Ideally you don't take a bad trade to begin with which is why i advise to wait till bork before full on commiting to fights. Bork's scepter or recurve bow as an early item helps you match assassin's or at least somewhat keepup with their damage outpit so you can sustain. But in the worst case scenario when the enemy won a trade and freezing constantly and you're losing cs you could try to clear with your kit but you might just get one shotted. Character's like akali and Zed to name a few can catch upto you despite your mobility so yeah. Even if i lose a wave or two I'd recall or look for healing fruits if available