If you have a Decree of Aldrich, use it. If you don’t, use Wrath of Ascendant . https://www.grimtools.com/calc/bVAWe76N That should perform better. With %total dmg modifier its worth to max MoE for maximum upkeep.
It doesn’t. If you see a skill in red in grimtools, it means that you’ve overcapped it over hard cap — basically with the current setup you have free skill points that you can remove from that skill via spirit guide and put them somewhere else.
Just like in the game itself you can’t get over hard cap by adding skill points if you are already at hard cap. But you can do it if you first invest in the skill and then equip gear that adds skill bonuses.
E.g. You have no gear equipped and you add 16 points to CT leaving it at soft cap. Then you equip gear that gives +12 to CT in total, this puts CT at 28/26 when hard cap is 26. In game it’ll be displayed as 26/16, because you’ve reached hard cap and points over that cap are ignored, in GT however you’ll see the skill at real values - 28/16 indicating that you exceeded hard cap for that skill and can move these points somewhere else.
Btw, this feature might be useful to review your builds after a patch goes up, because gt uses the most recent game data and if you have all skills at hard cap in some build right now, that same build may have certain skills over hard cap if there are changes in the patch that add +skill bonuses to equipment that is used in the build.