So in agreement with the Narya concept included, posted in the Gondor Suggestion area, I thought of something small yet new for Gandalf's character.
For a long time we have grasped the situation of Gandalf using his Erebor powers and I think I may have found a way that works like Saruman's Wizard's tower.
Where Saruman gains powers on a global weather scale, Gandalf will gain his Erebor abilities via the Firework Cart. How will this be implemented?
Much like the Witch King of Mordor being able to mount then be given the option to mount a fellbeast and then dismount--Gandalf will mount his horse/Shadowfax and then be given the option of the Firework Cart. The Cart would be clicked and dropped off on the area where Gandalf and his steed are standing and it would act like Thranduil's Feast of Mirkwood. Gandalf would then be free to move away from it on his mount or dismount on foot and move close to it. Like Thranduil's spell, only one cart at a time.
Within a certain radius of the firework cart, Gandalf's abilities switch to his Erebor incarnation, but like Saruman, if he uses his Erebor abilities and he moves away from the firework cart, he counts as having used that rank's ability.
For example Explosive Blast (Rank 1 ability) is used within radius of the Firework Cart and Gandalf moves out from the cart's radius, Gandalf cannot use his Wizard's Blast (Rank 1) because he just used the Explosive Blast in the cart's radius. Same is said for the Burning Pine Cones to Lightning Sword, Mount is still Mount, and Gandalf's Fireworks for Istari Light. I don't know what would be used in Word of Power, but probably his Rank 10 ability from 3.81 or something different.
So what would be the downside to this? Well if Smaug, Balrog, Sauron, Saruman, Fire Arrows--you get the idea fire attacks, hit the cart, it explodes like one of Saruman's mines, it would have good knockback though I doubt it would do as much damage as one of Saruman's mines--but I would leave this up to the beta testers to decide and since Gandalf bears the ring of fire, I would doubt it would do much damage anyways.
So all in all, why include this extra feature including the ring of Narya with Gandalf? Because it is gameplay balanced (erebor gandalf and gondor gandalf have been tested repeatedly), it is canonical (Gandalf wandered, his set up of fireworks at different areas of the map exemplify this as well as his abilities when it comes to using his firework attacks), it is not overpowering (like Saruman's wizard's tower his powers are used), Gandalf the White enhances these abilities and doesn't affect a change in powers or gameplay, it still works with the Narya concept perfectly, and finally this offers a small nice bonus to those faithful to the lore and want to see something canonical and new that isn't overpowered, yet is still balanced.
I hope you enjoyed this review. I will leave you all with these final thoughts: Grimbeorn gets all of Summoned Beorn's abilities, Haldir gets all of Summoned Haldirs, each of the three hunters get all their abilities in their character forms, and so why shouldn't Gandalf in a very fair, balanced and fun way?
Take care everyone.