The Acceleration Rune increases the rate of a couple operations. While normally the operations of the Charging Rune and Displacement Rune occur every 20 ticks, one tick of the delay is removed per rune, down to a minimum of 1 operation per tick.
With some Netherite Scrap and some Intricate Hellforged Parts looted from the Demon Realm, you can double the power of your Acceleration Rune, removing two ticks per rune instead of one, freeing up other slots around your altar.
If you change your mind, you can undo the recipe in the ARC.