What Top Shot?

 Hi all. I have a TLD25 on a short overhead that i use for a bit of LBG ballooning and fishing from my kayak, and will do some bottom bouncing in future with it. Its spooled with 40lb braid but recently lost a bit to a boat that ran over my line so gonna put more line on so i got max capacity. Should i just add more braid so the line will float for balloons or top shot with some mono for stretch and line sink? And if mono which? Thanks