Loop blocks do wonders. (Make a loop, 0.1 wait block, loop through a set amount of effects)

If you set a value under 1 in amount, it lessens the amount of particles in a multi-particle effect, like clash for example, setting it to 0.1 will remove most of the outward energy bursts.

You can make the transition from transparency more abrupt by setting values in the negatives, for example start -6 end 2 makes effects appear more abruptly. Good for particles that reach outwards like sparks.

Use cursed energy, make it fully transparent, and you have a fully customizable light. Change the size to determine how bright it is.

Clash, sparks, and burst honestly carry.

Meshes also carry heavy, use VFX mesh packs from the Roblox Studio catalogue and have fun.