Makoa's shots will halven in damage before beginning to fall off at 65 units. Memorize this distance and stay out of it to render him ineffective at damaging.
This is a tip for Lex VS. any champion.
When chasing down your target, don't blindly follow them.
It's best to let them walk into your hands, cut them off around corners.
Line up your crosshair with their head, for an easy headshot.
Bomb King is a great DPS champion that can outdamaged Moji. Plus, Bomb King can hide behind walls to avoid Moji's hitscan damages while doing area damages towards Moji.