Greetings,
Thanks for providing us with this nice calculator and I've recommended this to many of my friends. They said that the calculator helped a lot when calculating the best solution for selling Intense Power Crystals. However, they still pointed out some issues and suggestions which I'll list below.
The first thing is about the upcoming crystal prices for GMS Reboot. As Nexon had announced in the GMS Update Roadmap here indicating that the Reboot Multiplier will be increased from 3x to 5x with the Summer Update (DESTINY) which should be live on late June 15th (UTC).
The second thing is about the Boss Clear Counts. For example, I have 2 characters that can solo Hard Lotus and 5 characters that can only do Normal Lotus. The calculator can only register one difficulty of Lotus (any of the weekly bosses) only so it can't satisfy my requests. Also, as the calculator is considering all Boss Clear as SOLO, I can't register the Bosses I carried my guildies. It may be a better way to add a chart for each boss where we can add some detailed information in order to make the calculator more accurate.
Hope the things mentioned above can help with improving this calculator. Thanks in advance!