It looks like the Ferroscale Armors provide moderate armor bonuses with no movement penalty. I use proto logi for sniping works with Enhanced Std. Armors, so the movement penalty doesn't bother me since I stay out of range. When I get hit by another snipers, I survive 80% of the time because of the armors. So when I get hit, it helps me to determine where the shots come from before taking the enemy snipers down. I like that the Ferroscale Armors are more lighter, which give no movement penalties, making it seem ideal for snipers. But I don't know if it's worth it for me. I thought maybe it is much more fitting for Minmatars. Do any of you guys use it?

Be thankful that the Logi was provided with only one weapon slot. Besides, sniping is not the only thing I do. I'm a support as well, providing nests like nanohives and drop uplinks for whenever my squadmates need them. I don't see anything wrong with Logi being snipers. There's heavy snipers, assault snipers, scout snipers, etc.