Summoning is one of the most useful skills so you should definately work on that, its fairly easy to train but can be expensive. There are several ways to get the charms to train it, the most popular being Slayer, just picking up any charms that are dropped on your tasks. As for Dungeoneering, it can be a very fun skill to train, depending on your team etc. It also unlocks some great rewards so you might be interested in it. :thumbup: