Talk:Akashi's Improvement Arsenal/@comment-24375640-20151016064442/@comment-26154973-20151016165002

Official twitter says Akashi Kai has better success rate. Also, there is this video (pics), +1 to +6 is generally safe without slider, you only need it for upgrades and when you're close to +10 (your preference, from +7, or +8/+9) and/or spending rare equipment (like 20.3 #3).