I did some adjustments to Lucario's aura mechanics the other day, and it's a mix between a buff and a nerf.
Basically, I modified Lucario's aura mechanics so that its damage multiplier no longer goes below 0.7x. As for the nerf portion of the changes, if Lucario's current damage is set at 47% through 96%, the damage multiplier will end up being weaker than with the original mechanics. Part of this has to do with the new mechanics requiring Lucario to have 75% damage for its attacks to deal their normal 1x damage amount; that's 5 damage points later than with the original mechanics.
But starting at 97% damage, the new damage multipliers begin to leave the original multipliers in the dust, with the multiplier going over 1.7x at 173% damage.
The damage cap is also increased to 200%, where Lucario's attacks would deal 1.9x their normal damage.
On a side note, the damage multiplier can actually go up to 2x with my edits, but only if Lucario is trailing by a good amount, and has taken enough damage. If it's leading a match, the multiplier never drops below 0.7x.
Mega Lucario also gets affected in that its attacks would always deal 2x damage, regardless of its current damage. This basically references how the Adaptability ability raises the STAB multiplier to 2x for Mega Lucario's Fighting-type and Steel-type attacks.
One may wonder why I did this, but just remember that at 47% through 96% damage, Lucario won't be able to make KOs as easily as before.