I don't much care for what happens between f and t, or t and t (on the first line). The space is just too tiny, but making it any larger would impair rhythm. Option one (on the second line) is making ligatures. Option two (on the third line) is making contextual alternates. I'm leaning towards contextual alternates because the ligatures are awfully dark and sort of odd. The contextual alternates are odd looking as well, but not as bothersome.
In other news, I'm finding dribbble totally useful as a feedback tool. Thanks for the thoughtful comments. Don't click like.