Felt like we rushed through the first NightLord

Me and the bud got the game earlier today. Did three runs, last one we decimated, but seemingly due to how knowledgeable our random was, we keened in on how quickly he knew where everything was at (he pinged very well, we never stopped moving) and just stuck to him like glue. That third run was beautiful, but it also felt like we didn’t actually learn anything. It felt like we were carried, not through skill, but through knowledge, and I fear my next runs we’ll be holding back due to still not knowing a damn thing. That being said, nothing incredibly in depth, but can ya’ll drop some “I wish I knew this from the very beginning” type of facts/infos? Things like what I read just recently, the boluses being perma resist buffs. Thank you