Less is more if you plan on doing no water changes, I'd suggest excel or non CO2 if no water changes are the goal. 3x 20w Triton 20 watt of 2x 24 w T5's would be nice.
Adding CO2 is going to drive the growth too fast and require water changes more often or else a lot of balance and testing.
It's easier as well as more practical to do the water changes.
Now if the water change issue is really a large one, and you want to still be practical and realistic over time, go non CO2.
These paths will lead to long term tank stabiolity and less errors on your part, and there will be many, just be smart enough to minimize them.
Regards,
Tom Barr