Ok.
I have an ice axe. A Black Diamond Raven Pro 75cm and I hardly ever use it. I am 6'1" and it is sized nicely for flatter ground. I always have trekking poles though and never use the ice axe when moving over easier ground.
Then I went to the Mont Blanc, and we had to cross some glaciers before we could go ice climbing and mixed climbing.
I didn't use it then either. Rented two axes. One technical ice axe (eclimb cryo), and one kind of mixed-use short Grivel that I was using to traverse the glaciers/pass the crevasses. On the steep technical terrain ice climbing I used it in combination with the cryo axe. I was going to check the size of the rented gear once we got back, but of course didn't (too busy stuffing my face)..
Now I would like to get a Grivel Air Tech Evolution. Use would be:
1: This for when I am on non technical terrain in Japan, when for the majority of the time I would use trekking poles. When on dodgy or steeper sections I could get the one axe out. Even in summer in the Japanese Alps I have been on terrain where I wanted an axe because of year long ice fields that were too steep.
2: When going back to Mont Blanc etc. I could again use it for ice climbing, in combination with a rented technical axe. It would do double duty during glacier traverses, in combination with one trekking pole.
I thought it would be easy but I have been going back and forth between 53 and 58 cm sizes. The 58 feels better for glacier use. The 53 feels better for actual climbing use. Went to a shop today where they had both and still thought I'd get the one, then the other.
58 seems more general, but I don't want to make the same mistake again, and have a too long axe that I end up not using. On the other hand, I don't fancy bending over like an old man to stick the 53 into the ground with each step.
I will just commit to one or the other, but thought I'd ask here and see what people's thoughts are.
So the question:
For people using an axe with one pole – how did that work for you? Do you put the pick in the ground with each step or only mostly use the pole and just have the axe ready in case you slip? And for people that have experience using an axe like the air tech evo in combination with a technical axe (that are mostly 50cm), did you think a 58 was definitely too long or totally fine?
Any advice/experiences shared greatly appreciated.

