Clues and Angel's throne

There is a little bit of inconsistency.

If we consider clues as supports It could even be right to think that it was not "you" that did cast the support, so it should not work with clues.
Basically it's the card that as secondary effect casts the clue(be it a spell, support or creature putting the clue in play).

This is could be correct but is still inconsistent.
Clues do work with oath of Chandra and oath of Jace.
Furthermore clues do reduce tyrant mana cost.
So basically something is not working as intended here or some description should be changed to properly reflect it.

Oath of Chandra is an example of food description for it to work since it does state "when a creature or support you control enters the battlefield", so does not imply that you played it(the clue) directly from hand.
Oath of Jace description instead is not in line with it being "when you play a spell or support".

Think all descriptions should be made clearer at the very least.

P.s. For insight on clues and other mechanic you can check topic in my signiture