too me, with tail glow this thing is kinda broken. Swords dance doesnt make it broken nessecarily due to the weakish attacks. But tail glow is hugely overpowered with 2 100% accurate STAB moves with 90+ base power, no damage from stealth rock along with hp electric/ground. If you use compundeyes its just as broken, with adequate spinning this thing will be able to get in and sweep like hell with blizzard and focus blast.
Maybe giving a +1 satk boost would be fine.
There are many levels of skill, but only one level of effort.