I've practiced both mantras extensively and find that SATANAS is significantly stronger and more intense, especially when used within the chakras, moving from the Base up to the Crown chakra. You can either vibrate all the letters of the mantra within a single chakra or assign one letter per chakra as you move upwards. As you do this, visualize your chakra glowing in a brilliant white-gold light or visualize its natural, vibrant color becoming more vivid and powerful.
This technique can also be applied from the Base up to a specific chakra of choice, or to the Pineal gland, to concentrate energy in that area - either to help unblock it or to strengthen and empower it.
It is very important to balance your energies using the Sun/Moon meditation after each meditation session, or as a final step right before performing your Aura of Protection. Lord Buer and Amon-Ra emphasized the importance of this to me many years ago - and to this day, I am very grateful they did.
The Merkaba meditation elevates your vibrational state, which makes it easier to manifest your desires and connect you to the higher realms. If this practice feels too complex or involves too many steps right now, it may help to focus on simpler meditations until you feel ready. You can also try incorporating the Merkaba occasionally to familiarize yourself with it at your own pace.