Oh no, not over LoL directly, 'cause you're right it doesn't have one. When I play online games for the PC I never use it's built-in voice system even if it has one. I always use either Skype because I can monitor my connection better and use Screen Share to show my partner something on my screen, or I use stuff like Xfire which is/was made for that exact thing. 

But I don't. D: Not since I got sick. I mean, technically my mom is paying to fix my car up and, uhhh... our friend Jack is getting me a quarter bag apparently... but aside from those two (vastly unrelated) things, I'm not doing anything. xD My friend Laura from the Guild here is trying to buy me something over eBay but I won't give her my address. NO GIFTS UNLESS I DESERVE IT. >:D