Sometimes when talking about articulation it’s easy to get caught up with what the tongue is doing and to forget something quite fundamental about playing.
The tongue produces no sound on the flute. So irrespective of what your tongue is is up to, in order to produce a good flute sound you have to have good air.
Remember my motto ‘Air is Sound’ or ‘Sound is Air’. So whatever you are focussing on with your tongue don’t forget to blow!