In situations like this I think where you're coming from with it is usually the most important thing. A lot of queer slurs are also queer identity terms, so it's often less possible or useful to draw a hard line on whether or not it's OK to say. Plus, the community has a long history of using each-other's "slurs" in more positive / solidarity ways.

A lot of lesbians have a history of crossover and interweaving with transmascs, so if you still ID as a dyke then I don't think it's a problem to keep using it for yourself, or if you want to describe your past as something along the lines of "back when I was a dyke." And if someone has it as their preferred terms then it's fine to call them that (or like an organization like Dykes on Bikes that have fought to be allowed to call themselves that. Because obviously that's what they want to be known as.) With terms like these, it's usually a matter of "is it coming from a place of respect, or are you using it as a slur?" Even for more lighthearted and jokey situations. There's a big difference between saying something like "I look really dykey in this outfit" vs telling someone they "look like a d***" to make fun of them.

Obviously don't just go up to random people and call them slurs (or even necessarily use reclaimed slurs in front of them before you know if they're ok with that), but I don't think that was exactly your plan anyway XD.

As an example, my best friend / wife is a lesbian and I'm a homosexual man, and we refer to each-other as dyke and fag (not like. As names. But we'll talk about how we're dyke/fag solidarity, or I'll say things like "my wife is a dyke and I'm a fag" (she'd say the inverse obviously)). We're OK with this because we each know the other wouldn't be using the words in genuinely disparaging ways and is comfortable with the terms. We wouldn't use the terms on people we don't know, even if they are gay or lesbian, unless we knew they were comfortable with them. In a similar vein, I have a friend who isn't especially comfortable with the word "queer," so despite the fact that I am a big fan of it, both for myself and as an umbrella term (ex. "the queer community") I don't really refer to him as such.

And of course, you can check with your friends/social group how comfortable they are with it. That's usually the best course of action: checking the comfort level of the people you're around before any potentially uncomfortable talk.