BOAC
The two times I have had the misfortune of being caught in a cell in the ITCZ (both times because the radar lied) were not fun. Firstly in a King Air I went in at 28,000 feet and it spat me out at 38,000 feet, the 10,000 feet climb was dome with zero thrust. It destroyed the nose cone and had two lightning holes in the leading edge. The second time in a Hawker only destroyed the nose cone and dented the leading edges. I would deviate as much as it takes to avoid lines of CB's in the ITCZ