I have two wizards in my hand, I cast the first one and pay 1 to make a copy token of that wizard the ETB triggers.
I tap the Wizard I cast and it's token to put another Wizard in play with Cryptic Gateway.
I sac the tapped token Wizard with Ashnod's Altar make a token of the Wizard that entered, return the other previous tapped Wizard to my hand with Cloudstone Curio. Then repeat this process infinitely.
This looks like it should work how you want, so lets go through it:
You have Wizard A and Wizard B in hand.
1 - You cast Wizard A, when it enters the battlefield both Inalla and Cloudstone Curio trigger. As you control both you can stack them in the order you want.
2 -If you stack them so Inalla's resolves first, you can pay to make a token of Wizard A. (Note this triggers Cloudstone Curio again, but it is a may ability so you don't have to use it).
3 - In response to the original Curio ability, you can activate Cryptic Gateway to put Wizard B into play.
4 - When Wizard B enters it triggers Inalla and Cloudstone Curio again. You can sacrifice the token of Wizard A to Ashnod's Altar to get CC, which can then be used to pay for Inalla's trigger to make a token of Wizard B.
5 - You can then let the Curio trigger from Wizard B entering resolve and return the tapped Wizard A.
6 - Repeat as needed, getting an extra mana from Ashnod's Altar each cycle, and any other ETB triggers.