Board Thread:Game Discussion/@comment-89.240.65.203-20130708201610/@comment-9477730-20130708205005

Actually I would recommend the opposite.

Using cards to update weapon & bots give 2x the experience/upgrade point during an event; which mean you will need 2x as much card to upgrade outside of the event. (It is also worth 2x as much to sell card for credit during a event)

Meanwhile Transmetals give the same amount of experience/upgrade points during or outside of an event & the same amount of credits.