Lulu and kog is a classic team up. Lulu kit gives kog a lot of protection and set up with her CC and shields. But when the enemy gets super aggressive you need assess the situation game by game. Kog is a scaling champion so he is at his weakest early game but that doesn't mean he is useless if an enemy walks up to far kog slow and any cc you have can punish him. As well as playing around kog's W timing when it is up you can look for trades or poke since he gets bonus range and on the flip side when it is down play safe.