I'm probably going to use thermally conductive tape, so if the IC is lower than the other components I'm going to have to put a piece of Cu or something between the tape and the IC. Thank you very much sinner for your help! +1 coming your way (After I spread some rep off course)!
I've been running my X-Boost round @ ~1.9A and that lil sumbitch gets hot! I've stacked copper bits on the IC and other components to fit them against a larger, coin-style heatsink (~15mm) and it's only enough to keep it stable @ ~1.675A with the thermal protection. I'm going to heatsink the bottom on the board to the C-6 pill, running wires through to the battery PCB. That, and the stacked copper should keep it cool enough to run a steady 1.9A.