More then 8 Skills - but just 8 buttons

Hello guys,

I finally found the time to play the game and it is great :)
As I`m progressing through the acts, I noticed, that I run short of buttons to put skills on.

I play a spectre necromancer and use 9 skills at the moment, but only have 8 buttons to put them on.
So I started activating the aura that I need and then switch the skill on the button to an active one.
But if I die, I have to reallocate the skill on that button, so I can activate the aura again and then switch it afterwards.

That´s a bit annoying.
Not that I plan on dying much, but is there a way to activate auras without allocating them on a button first?
Or can you allocate two skills to one button?

You have to keep any passive skills like auras and heralds on your armor pieces, then you equip a weapon in your second slot and set them to that shorcut set. Then you just swap to the alternate weapon set to activate them after you die. Swapping sets is R2 + R3 in case you hadn't found that out yet.

Thank you, I´ll try it out later :)