I wanted to play a Killoren in PF and I found this link which seems like a good conversion but I know the original Killoren could smite once an hour up to a maximum times per day up to their Cha modifier.
Now granted they boosted the damage on Undead, Constructs, and Aberrations by double, but if I increases Nature's Might to 10 over 7 would that make up for increasing the number of times you can use this smite ability? I don't think making it once an hour equal to his Cha modifier is wise because that makes them insanely strong but how much so I cannot tell? Should it be limited to a number of times per day equal to 1/4th their HD which means 4 by level 20 or make it level like the paladin smite but only going to 5 times per day so at 5 HD at 9 HD at 13 HD and again at 17 HD to give Smite 5/day.
5 Times a day + 7 times a day from paladin makes you smite happy and would be a damn good smite build. But remember the original killoren could deal a smite attack, not smite in general it was only a individual attack that would deal Level to damage.
Honestly keepig it the way it is in the books wouldn't be too bad.