I’m going to suggest something a bit different - a flat-rate interest of 12% with a 10% community tax.
I think a 12% inflation would be enough to incentivize investing and staking providers. In addition, I’d rather have a flat inflation rate, as I don’t think the variable inflation rates make that much of a difference unless the spread is large (something that we probably don’t want in any case), and the simplicity of a flat inflation rate will make discussing network economics easier.
While I agree that a strong community pool is a good thing, at first I’d rather not see the community pool inflate too much. I think a moderately sized community pool will incentivize contributions, without having too many projects that rely solely on community funds as their economic model & motivation (or worse, attract people looking to scam)