Yeah it was alot easier in the second one due to that ability that shows you the nearest blast shard. Just had to get out a map and cross off each one as I picked it up. I thought I had fucked it up because scanning the map only showed one shard on a certain building, but you have to climb that shit for the other one to show up. Still though despite their being 350 of them the hardest trophy was killing 25 guys while riding on a moving train.