You would take half with Gisela out, so just a single damage per nonbasic land you are running, while your foes double, so essentially four damage per nonbasic land they control
A 6/6 is pretty big but most decks can take it down with a simple double block
Icon of Ancestry, for example, has the same +1/+1 typal bonus as Vanquisher's Banner, but for three mana it allows you to search the top three cards of your library for a Goblin to put into your hand
The Ur-Dragon It had to be here
According to Mark Rosewater, these reprintings upset the silent majority of Magic collectors, and Wizards once again changed the reprint policy, this time to include premium versions of cards
So while Council of the Soratami is a brilliant side of a card to have as a backup it is not a great reason to include as the main function which it invariably is due to five being so very much in the cube