Many things happened on the battlefield at the same time, too many even for the Lightseeker himself to keep track of. Sam's ability allowed him to see almost everything and while his brain had evolved to process a large amount visual information, it was not enough to cope with the overwhelming amount of events that went on at the same time which is why he decided to keep his attention on the biggest threats only.
Not that it was easy for him to focus when most of the field was filled with debris, dust and scattered particles of what used to be Uriel. Said particles attempted to reform themselves into a functioning body at a speed Sam never experienced back when he was possessed by Water warlock, though now instead of envious he was relieved because he also never experienced such limitless power being unleashed on him like it kept happening to Uriel.
