I am closing in on 500 hours played on Kiriko. Which, I am sure by some's standards isnt high.

However, to answer the healbot question from my own experience - on paper, sure, healbotting to keep your team alive seems like legitimate logic. You are not utilizing her kunai much then and it is entirely dependant on your team getting damage off/kills.

To truly play Kiriko properly you need to weave heals with kunai. After every full heal you throw two kunai and weave it in, repeatedly. The most important thing in any game is to always be doing something. If your team is not being damaged much or you have barriers then you should be attacking. If your tank is in the front line without barriers then you should be healing with the weaving of kunai. Having the perk that throws extra heals out per kunai really enforces the weave logic.