Below is a screenshot from Tamriel trade center. Pages and pages of Columbine going for upwards of 3500 per, with many going for over 4500

Just the columbine for a stack of 100 tristat potions costs an average of 100k. 1000 gold+ per potion, and they are a staple of PvP community play patterns. At this point it's completely impossible to sustain tristat pot consumption with the rewards from content, PvE or PvP.
Something's gotta give on these, and I'm not here to say
@zos this is for sure a problem and needs to be fixed in your game that you say you own/run. But it's kind of a problem with this game that you own/run. While I know I will never be asked by an employee of ZOS how to fix this problem, here are some ideas on how to fix this problem:
-Give Columbine in rewards for the worthy, everyday and all year.
-Add one or several other reagents that can be used instead of Columbine
-Create more options for mag+stam pots that don't use Columbine or other current huge money reagents. The health restore is nice but is the least useful thing of these very useful potions
-price control through buying with AP. This is probably less than ideal though, since the biggest users are printing AP like mad men and getting the price right without killing off the buying and selling of herbs would be trickier than "fixing" cross healing.
Last idea: Just get rid of them. I love them, I love using them. But let's be real here, in the hybrid era these are like a top 5 enabler for do it all builds and drawn out fights, and no other potion option (except the rightfully even more expensive stam/mag/heroism) is close to being as universally useful.