My mind might play tricks…but I believe the original Falcon had adcth…and was removed for obvious reasons.
Where ghoul and specially bat excels, it’s at being the few direct high healing sources (WD on heal is great + bat has multi hitting, pierce, high %total damage leech and ghoul is almost bis on every %WD builds).
Why aren’t other options taken? Poor or lack-luster nods/don’t fit the build’s T3 path.
-Toad has little heal and green/purple based + it’s nods are pretty terrible.
-Celestial Lotus’s only interesting nod is the %phys, but has no source of good regen to fit caster (and poor energy regen)
-Harvestmen’s scythe’s has decent nods, but scattered on 6!!! nods and without any devotion power, is eclipsed by things, such as Giant and ToL.
-Lizard has decent nods, but without any adcth or devotion power, ghoul and bat will be choosen instead.
Because Bat can also be linked to castable/dots/debuffs skills, which will independantly serve as a source of healing, it’s a no brainer.
Had bat been only given to melee/rang based skills, history would be slightly different.
But I believe it’s a little too late to change things (at least nerf-wise). Proper T1 constellations underlined could recieve buffs…but would it really help? Bat and ghoul already have their use.