even if joan failed to win over charles if she survives the war I can easily see Jean duc d Alencon take her under his wing. Otl he was her biggest powerful supporter and was devastated when she died. So lets say tremoille proves unsuccessful in convincing charles to not reinforce joans troops and joan gets the reinforcements then she could've won. Provided she continues her victories and ends a conqueror. Otl charles promoted her family to minor nobility. So perhaps even if she is removed from the scene i can see charles granting her a similiar minor noble title for her service. (1)
If all else fails she still has one supporter, Alencon. Alencon would no doubt if she asked him to, take her under his wing and she could become his advisor if charles refuses to have anything more to do with her. What is unlikely is her playing an influential role in Charles' court after the war. Her best case is after the war Alencon appoints her commander of his troops and she serves France due to his backing. (2)
Charles of course will not move I doubt against a prince of the blood for someone like Joan. (3) So yes her military career can continue but only if she retains Alencons' support and after the war (4) serve under him rather than directly Charles (5)
Remember Alencon was a feudal lord who had his own armies which answered to Charles. (6)
1) She got the same minor noble title in her lifetime as her two brothers. But with greater victories I could see Charles raising her to a higher status of nobility.
2) Problem is, in later years Alencon turned against Charles to the degree that Charles ordered Dunois to arrest him. Between Alencon on the one side, and Charles and Dunois on the other, I can't see Joan of Arc of all people turning against the King of France, no matter how close she was to Alencon. She'd more likely try to play the role of a self-appointed (and desperate) would be peacemaker.
Alencon had serious problems with his own ego thanks to he and Charles sharing the same French king as a great-grandfather.
3) I'm not sure of your meaning here? Could you please re-phrase this sentence?
4) The war went on for another twenty years.
It wasn't until military technology improved with French artillery allowing the destruction of even the strongest fortresses in just a few days that there could be any blitzkrieging in France.
Joan moved very quickly, but her victories were difficult to secure.
Also, France's finances were still in a mess.
Basically, Charles needed John Duke of Bedford's wife (Anne of Burgundy) to die of the plague in 1432, then Bedford's remarriage (to Jacquetta of Luxembourg), to insure outraging the Duke of Burgundy (Philip the Good) over the "insult" to his dead sister, followed by Bedford's own death in 1435, to rupture the Anglo-Burgundian alliance and make a Franco-Burgundian peace treaty (and alliance) possible. Until this happened, France would be fighting a war on two fronts, against two of the richest (Burgundy) and most militarily powerful (England) nations in Europe.
Joan's survival would mean an interesting amount of gasoline being poured on the military side of the HYW, but any serious actions waged by the French against Burgundy at this time (1431-1435) was a mostly wasted effort. Even Joan's voices had gone silent.
5) I don't know how thrilled Joan would have been fighting under a feudal banner. Frex, technically she could have, I suppose, followed La Hire when he was forced by economic circumstances (when Charles pulled his financial backing) to go to Germany (Eastern France). But she didn't.
6) Except that in Joan's time Alencon, IIRC, had just been released after paying a ruinous ransom to gain his freedom. IDK how much of a levy he could have raised right during Joan's time. Probably not much bigger than the followers she had when she was taken prisoner.