Regarding Colossal Totem on level 1 ". If the talent ever becomes good in the competitive scene, you can be sure I will do reports on it."

It's actually picked more than Lightning Bond in competitive play. especially considering it's got great synergy with Earthgrasp Totem which gives Rehgar a very powerful late-game. You'll find that, even tho the Totem can get blown up fairly quickly, most of the time that 50% increased radius and range will really help you chase a target or just disengage. Plus, with the increased range and radius you'll be able to actually position your totem out of the way of random AoE effects which can break it.