After changes Tequatl head is almost impossible to hit (no number dmg).
With left turret at west defence I was able to hit tequatl head only when he was weakened (after landing with 75%,50%,25% hp). Still it seems that ‘2’ skill was working.
With GS mesmer I also had problems with hiting head (a bit more often I could damage head – it never worked when he summoned his fingers).