So in a recent Q&A jagex proposed new changes to the Dragon Spear watch clip here
(start at 22:05)
The changes proposed by jagex are:
-Make it possible to drink potions when stunned
-Make it possible to change prayers during stun
-Make it possible to die (so when 0hp die straight away, even if stuns are stacked) so that one guy at the back ranging trying to get the kill will now actually matter
So it will be much harder to smite people for their +1.
we can take +1's if this change happens and will probably be using the ancient mace.