The Aran Calculator V3.5

What would you suggest instead of two seperate buttons? Maybe one button for "weak/strong to ice" and then another that if checked it is weak and unchecked it is strong against? That may work.

A drop-down box, silly. Like in my spreadsheet. Have it be set to Neutral by default, then be able to drop down between "Weak" and "Strong." Although weak is somewhat moot since if you would be attacking something that's strong to Ice, you'd just turn off Snow charge, it's hardly too much effort to just add it anyway.