Inquisitor Power Siphon Wander damage too low compared to Assassins?

I was searching on poe.ninja and trying to build a KB/PS inquisitor wander. It seems like 9/10 of the power siphon characters are either assassin or some kind of ranger. Not only that, the top assassin PS damage output is about 10x the highest output produced by an inquisitor.

As far as I know poe.ninja doesn't factor in things like ele resists so it's not the whole picture. However I'm still quite shocked to see inquisitor doing so low compared to other ascendencies. Can anyone who built an inq wander recently provide some insight on late game damage/viability and whether I should reroll an assassin instead? Thanks!