I think Ardent Censer is a bad concept and should be reworked
It allows the support to basically donate their gold to the ADC instead of building items that help to support the team in general. Like even if you think an item like Mikael's is only for the ADC that's false because you can use it to great effect on any ally given the right situation.
Ardent Censer is a statstick except you're givng the stats to the ADC. I think this encouraged the excessively ADC centric meta we're in now. The whole reason we give all farm to the ADC is that it's more efficient to focus the farm on one carry instead of two due to exponential damage scaling. So an item like Censer becomes mandatory due to more attack speed on the ADC being a more powerful buy than anything else you can buy.
The game would be better without an item like that.