You are OK with profile slot management, creation, etc?
How many slots do you have, per https://support-portal.plarium.com/en/throne-web/faq/heros-profiles/managing-heros-profiles ?
Or https://support-portal.plarium.com/en/throne-web/faq/heros-profiles/unlocking-slots
https://support-portal.plarium.com/en/throne-web/faq/heros-profiles/managing-heros-profiles for management. e.g. You should be able to save to slot 4 with current equipment, then revise and replace the profile as you progress.
Is this much working for you ok?
https://support-portal.plarium.com/en/throne-web/faq/hero/equipment notes "Use the Inventory Expander item to add 4 extra slots"
Whenever I have run into this, it offers one of these items to me to purchase for gold, increases my slot count by 4, and I proceed as expected. Hopefully you see the same. i.e. I go to craft another piece of equipment, and this offer comes up.
In Items / Item Store / Inventory Expander. Looks like:
I believe they are in packs, too. They come from killing things (Alpha's, n6's) I expect. As you see, I have 166 of them - I have not bought any such in a very long time, and I have many inventory slots.At top of Palace / Statistics / Hero / More (red button), you can see how many equipment slots you have. Do you see enough there to do what you expect?
It looks like: