Board Thread:Game Discussion/@comment-5570760-20130722201831/@comment-10822880-20130722204820

The correct time to MTM a raid card is as soon as possible! The bonus on any raid MTMed raid card elevates it above most (possibly all) level 5 bosses and will increase your DP significantly. This bonus will disappear when the event is over. Do it now!

Non MTMed raid cards have weak health and die more quickly, plus lose out on added bonuses. There is no overall benefit in have 2 single raid cards maxed as they will both die fairly quickly even though you may think you have a better attack; this extra attack potential will not get realised!