In doing the active exercise and the sitting meditations (in regards to all spiritual practice, I always ask "how is that working for you?" By all means, keep doing the meditations you have been doing for decades, if they help you in other ways.
And add more time with Small Universe--see below), add the intention just before you go into the emptiness--for example: "My anger is excess energy--like all energy, neither good nor bad. I see my anger as excess energy turning into _______ (add the imagery of your choice) and leaving every part of my body to return to the Universe (or the earth)".
Also, to return to my parenthetical above: meditations are also exercises. In qigong, the type of exercise includes the type of meditation. A huge part (maybe as much as 50% or more!) of all qigong (active, sitting, standing, or lying down) is in fact meditation.
The essence of your question is not "what
movements will help?" (although there might be certain movements that are helpful), but what
qigong exercise will help. And qigong exercise includes meditation.
Here, part of the answer is the nature of what meditation you do (not only how much time spent in meditation). The Small Universe is a very powerful qigong exercise, probably the MOST powerful exercise in the Spring Forest Qigong.
Master Lin has said that if time is limited, spend more time in Small Universe.
So one direct answer to your question is "Small Universe".
I cannot emphasize this enough. What exercise can help with your anger? If you have been meditation for decades and this does not seem to help enough, add more Smalll Universe. If your schedule is already packed, take time either from SFQ active exercises or from other meditation exercises or disciplines.
And for guided meditations, although I like Self-Concentration, there are two other ones that Master Lin has that I like much better: the "Butterfly Meditation" and the "Healing Our World" meditation. They are both a few minutes longer than "Self-Concentration", but I like the tone and the content better on these (I alos like the glass of water at the beginning of the Butterfly Meditation.
I think both of these could help with anger issues. Most especially "Healing Our World", since this one focuses on increasing love energy from the heart.
Both of these are available from the Spring Forest Qigong center store.
I know that sometimes emotional energy is often difficult to let go of. Although I am not very experienced at it, I find the Sedonna Method helps with letting go. It seems to me that sometimes my habitual emotions are even harder to let go of than physical pain. And certainly, there is nothing like righteous anger to trigger the inner response, "Oh, no! I am not letting go of
THAT! Forget about it!". Even when we think we are ready to let it go, it has often become so much a part of what we (at least, think) are, that letting it go, often seems to our ego minds like letting go of a limb.
And this is where the nature of what meditation you do (as well as how long spent in meditation) can really help.
I hope this helps. Helps me!
Thanks for asking.