I don't think that Singe needs it's stats before since Singe already has a huge boost to primary stats. Just a
Little more % on stun or perhaps turn that stun into high chance of terrify/panic then it would be a nice Arcane
pet to have. Since the buff of Singes AA is 13-14 seconds, it should be 15 seconds instead.

The cool down doesn't Need to be lowered since the buff adds a lot to your stats already, we don't need a pet that gives 50/primary stat for an extremely long time since without the AA we have +40/primary stat. To make it a little more OP,
it would be nice to add +5 to all stats EXCEPT your primary stats in the Arcane Ability instead of the Base stats. So if all these changes happen, the stats of singe would look like: +30/primary stat +10/all stats, 12% damage, damage reduced by 4%
Arcane ability: high chance to panic, ignite enemy, buffs 15/all stats except primary stats and buff 10 to primary stats.
With arcane ability the stats would be +50/primary stat +25/other stats. I think that these are the changes that need to be implemented.