Yes, since IOs don't expire that is a good way to go.
As you level up just use whatever level IOs become available to you. Upgrade them all when you get to 32.
Once you have 35s in everything, getting higher level IOs as you go is just gravy.
Good luck.
Awesome, thank you 
NPWSE
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As you level up just use whatever level IOs become available to you. Upgrade them all when you get to 32.
Once you have 35s in everything, getting higher level IOs as you go is just gravy.
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This seems to be pretty common practice and it's what I do. I'll slot level 35 common IO's and never touch them again unless I decide to use IO sets at some point.
Paragon City Search And Rescue
The Mentor Project
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Once you have 35s in everything, getting higher level IOs as you go is just gravy.
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It's important to note that a Set IO only counts toward the set bonus if your current combat level is within -3 of the level stamped on the IO itself. So if you slot all level 50 Set IOs, the set bonuses will cease to be active below lv47 any time you Exemplar/Malefactor. If you plan a Set IO build, figure out a balance point between actual Enhancement %-age and the range you want the Set Bonuses active. Note that you run into ED effects long before you get to 50 with most upper-range Sets.
I frankenslot at 32-ish. Earlier if I'm having issues at a lower level (my Dark/En tank started [url=https://boards.cityofheroes.com/showflat.php?Cat=0&Board=faq&Number=927800 7&fpart=&PHPSESSID=]frankenslotting [/url[ for end reduction at level 17, I think, and probably upgraded at 22 AND 27. )
It's LIKE generic IO's, except you get one or two extra slots per power.
Mini-guides: Force Field Defenders, Blasters, Market Self-Defense, Frankenslotting.
So you think you're a hero, huh.
@Boltcutter in game.
... by the way, to the OP: I recommend upgrading your generic IO's at level 25. 25's are 32% each while 15s are... 18%? Something like that. Anyway, huge difference.
Mini-guides: Force Field Defenders, Blasters, Market Self-Defense, Frankenslotting.
So you think you're a hero, huh.
@Boltcutter in game.
Today while playing, I had the luck of receiving some infamy from a high level while I was pricing things at the Black Market. So, I got to work on turning my Enchantments into level 15 IOs.
The reason I did this, was because I am thinking, I wouldn't need to do it again until 25 or 30. Am I correct in this line of thinking?
Second Question, because I am still leveling, would it be better to just have everything lvl 15 IOs when I get new powers and slots until I upgrade them all again, or would it be better to get IOs around the level I am... like when I am close to 20, put 20 in, etc.