I’ve been trying to figure this out for a while:
Notice the Healing Tower’s range (blue circle). What is immediatelly apparent, at least visually, is that Healing Tower’s range does not come in contact with the Spikes. The blue circle does not overlap the structure’s model in the slightest, but I have confirmed that the tower is in fact healing those Spikes. This means that, at least in case of Spikes, their model is in fact the size of an entire and single path ’ square’, while visually being actually smaller than that.
However, when it comes to actual Towers being within the range of a Healing Tower, we know by now that the Healing Tower’s range must actually touch a tower in order to heal it - which it currently does not; both Firebolt Towers are still not in range of the Healing Tower. And so when you compare how Spikes and other Towers are affected by the Healing Tower, there is inconsistency here.
In order to fix this problem, I believe the Spikes’ model should be enlarged in order to fit the entire path ‘square’ fully, becaue with the size it is now, it is giving out conflicting information to the player.