The div by 0 error in compareseems to require the line to be explicitly shown, so added a "0" value to it.
The div by 0 error in arena current dps seems to trigger when not in an arena, never used it before but it errored during testing
Idk if the resize thing can be removed, so for now I added not TWW in the check
The GetSpellInfo changes need to be checked because I'm not sure when to refer to which reference, but I've tested these changes in beta and it worked for me
Tested in both Live and Beta clients