Gandalf, Party Guest - How to win games and not just make them last hours?

{"ops":[{"insert":{"card-link":"Gandalf, Party Guest"}},{"insert":" \n\nHi all! Trying to get ahead and build a rough version of Gandalf, Party Guest: https://archidekt.com/decks/24431207/gandalf\n\nIt's been rough! I'm trying to branch out into some spellslinger fun, but I truly have no idea what I'm doing!\n\nI've had suggestions of Prowess, Storm, Extra turns and extra combats!\n\nProwess/storm: It feels like Ganfald wants to cast big splashy spells so there has to be a balance there, but also, there's aren't that many Legendary Wizards with Prowess, unless I have enablers. \n\nExtra turns/Extra Combats: Nice idea, but not if it doesn't look like I've done anything and life totals are the same at the end of my 3rd turn!\n\nCall forth the Tempest seems like a pretty solid wincon? Get a few combats I'm first then burn the table? But that's all I've got outside of making any game against Ganfald a slow, painfully grindy experience! \n\nLooking to be at bracket 3/4 but I'll just take playable at this point!\n\nThank you!\n"}]}