My opinion on the Ink Brush: It's good at establishing a fast trail to a zone in Splat Zones, but it's not really good at covering up turf in Turf Wars. In both modes, it's not good at attacking, either, which is essential for pushing forward in Turf Wars and holding down and capturing zones in Splat Zones. In short, the Ink Brush is mostly good at helping out your teammates, but not for yourself.