Greetings everyone

Firstly this thread has always been a part of discussions. It is a combination of almost perfect Gandalf and one of the mighty three rings. The suggestion is outstanding clearly as seen in favour list but might not be accepted for balance issue, i think. Thus i have another idea about this and would like to share it.
My offer based on faction characteristic such as all heroes of Rohan have mount ability because of a cavalry faction. So all of Gondor heroes can have at least one defensive aspect in their skills. The current situation that supported by this approaching is given below:
Gondor heroes;
Pippin serves the faction as Guardian of the Citadel that grants him hitpoints and armor.
Beregond shields nearby buildings from various standart damages in a certain extent passively.
Imrahil disciplines his Dol Amroth troops as healing with every attack for a time.
Denethor is not directly defending his faction but helps to spam units under Emergency Mobilization. He just saw the enemy in palantir, became hopeless and desperate but did not abandon his place nor actively his duty.
Boromir is just the summary of Gondor, fights to the end, provides armor to nearby units all the time.
Aragorn heals the wounds of heroes as having a path of a king and buffs his reunited kingdom’s buildings starting with Heroic Statues.
Faramir grants armor bonus to cavalry units and camouflage for ranger. However i try to reshape his skills, if i can edit a proposal about him.
Addition to this, it is known that Istari has been sent to Middle Earth against Sauron and allowed to use their full power only when it is necessary besides a couple of exceptions. Also Gandalf has been the real enemy of Sauron as being a maia who completed the task and came back to Undying Lands.
So my suggestion is that like Necromancer, Mithrandir should have two stances that are passive ability which can change automathicly depends on the situation in the battlefield.
Olorin shows his might against dark magic or actual threat for free people as seen in Moria vs Balrog or in Orthanc vs Saruman's fireball in the movie (Maybe vs Witch King in Minas Tirith, if Rohan has not come in the rightest time).
- Emissary of Valar: When he uses his skills against maiar, ring heroes or supernatural life forms (Balrog, wyrm, wight, wraith etc), nearby allied heroes and buildings does not suffer any magical skill or spell for a time.
After taking the Ring of Fire from Cirdan, wherever he goes, brought hope, courage and rezistance against tyranny and weariness of time as the Shipwright did with it.
- Wielder of Narya: All units gain fear and magic rezistance when he is nearby an allied buildings without weariness of time.
The main goal is that giving him a defensive aspect as he should be, not an ordinary a mass slayer who remained true to his mission, but making his protection kind against magic for balancing, lore and his personality.
Lastly when Gandalf the Grey is resurrected after killing Durin's Bane by Eru himself and became Gandalf the White, it can be assumed that Mithrandir won't die before his task is finished. So, i think his 'buble protection' should be effective after purchasing his spell.
It might not be perfect solution for everything as intended but can be developed due to mechanics and stances.
Best regards.