F2P 8x Chromium Pull worth it?

I think it was worth it overall, but that's because I generally do the same - spend my arena crystals on packs. I know that many say it's not the best way to spend them, but I figure if I keep building up shards - and pull some decent characters on the way - I might just be able to level up someone good to 6* or higher eventually. Plus maybe I'll get lucky and it will cut down on my farming time for Daka & Poggle by pulling them as full characters, saving me 80 shards which is quite a few days of GW tokens...and even more days of Cantina tokens.