Noble Hierarch has Blue identity I think, since it can make , so you can't run it in a Green/White deck. Just a heads up!

I don't especially like Lingering Souls or Spectral Procession because they are a low ceiling card (even in a perfect hand it's not great), if you're ahead already it does next to nothing IMHO. I agree it has a high enough floor (it's not terrible in the bad situations) to see play, like when you desperately need blockers these can give you several, but in general you want to design around having a higher ceiling rather than a really high floor because you need quite a bit of value to actually win games, a high floor rarely helps you win. In my experience you need a few cards that work better while you are ahead to actually win, and it's okay if they aren't good in all situations. I have had Visions of Glory be a dead card, but what I realized was that there wasn't any one card that I could have draw instead that could have won by itself, so I find it's bad when I'm going to lose anyway. I would 100% say Farmer Cotton is a stronger card that is good in more situations, but I run both in a GW Tokens/Counters deck.

I'm not sure what to say about the lands/ramp thing, but if your list is working for you it's not a big deal and you don't really need to change your mana base. I personally like ramp, and in a deck where I need to keep the Commander out for it to work I like to run extra lands, ymmv obviously. Maybe you could shave a non-land for a Khalni Garden, this makes you a token when it ETBs so it will still give you a body? Huh, I just looked and it's over $1, hard to believe!

After taking a look, I think I've found some cards that can have issues that you might want to switch out:

Re: Lands, Ancient Den is an artifact, which means it dies to stuff like Vandalblast or Austere Command, IMHO if you want any artifact lands you should look at Indestructible ones like your Bridge. There are also 'pain' lands, such as Adarkar Wastes or Brushland, but it's a complete cycle of 10 lands. Similarly I'd cut Public Thoroughfare and Temple of the False God, I sometimes run Temple but you really want more than 31 lands for it to work. I'd personally run closer to 36 lands in here, but your land count can vary based on your deck's average MV and how much ramp you run. If you run 36 lands you could keep Temple more safely, but I feel like it won't work all the time and it will feel really bad when it doesn't.

Re: Creatures, I don't think Esper Stormblade is a good fit in Commander (you'd want something like Baleful Strix IMHO), Fortress Kin-Guard feels meh, and I'm not sure if you have enough Modular creatures for Arcbound Overseer. Metastatic Evangel can be good if you've got a lot of counter synergy, and it's weirdly cheap for a card with that high of a ceiling. Evolution Witness similarly will play well with counter sources.

Re: Instants, Assert Authority seems awful, maybe just run Dispersal Shield? Cancel/Sinister Sabotage aren't very good cards, and they are mono-colour to boot, maybe try something like Absorb, Render Silent, or another counter that is 2 or 3 colours?

Re: Sorceries, Lingering Souls/Spectral Procession aren't great in Commander. Maybe Visions of Glory (it's only 4 mana to Flashback with your Commander) or if you've got some extra money Farmer Cotton is really good when I've used him.

The rest seems more reasonable for your budget/power level. Hope this helps!

I noticed you were looking at recurring cards, ideally repeatedly? If you just want creatures back one of the best solutions is Demon of Dark Schemes, this can be part of an infinite combo fairly easily (see stuff like Warren Soultrader and Mitotic Slime, maybe a Zulaport Cutthroat), and it can kill off a ton of weenies sometimes to boot.

If you like Gisela and Hidetsugu, you might also like Vito, Thorn of the Dusk Rose! If he gives Hidetsugu Lifelink you'll not only not die, you'll gain life, and Vito's static will then allow you to kill whomever is the biggest threat! If you can repeat it you can win on the spot, otherwise you'll probably win next turn. I think Vito's two abilities work with other combat damage strategies fwiw, effectively doubling combat damage to players (in the form of lost life, not Commander damage) for 5 mana isn't bad, especially when you're also gaining life, that can be quite a life swing.

I'm not sure how many counters you tend to build up over the course of a game, but I love using Legacy Weapon in my Sisay, Weatherlight Captain deck as an infinite mana payoff. It'd be a great draw if you've got a bajillion counters and you can't swing, sniping anything you want is pretty handy.