Archon isn’t very reliable for staying alive, especially in contrast to the buffed hydra.
If you are using Chantodo, what i like to do, is to just build up 5-15 stacks, or 0 stacks and just enter archon form to get the first 40-50 stacks from Fazula’s Improbable Chain belt, which will remain for 20 seconds while outside of archon, if you are also wearing The Swami hat. I use ray of frost and frost nova to build up chantodo stacks.
Since Hydra has been buffed, i prefer that for endgame and use Archon for power leveling, but i think, that my non-seasonal archon wizard is still setup for greater rifts(not 100% sure). You can try his build, if you want, and then change the parts, that you don’t like about it.
Just try to go for the kind of stats, that you see on my gear, they are also the kind of stats, that the game will show to benefit you the most, both in terms of damage and toughness. Most of the “build guides” out there use very specific setups and/or promise much better performance than what you get(which is probably due to how well the guide writers play the game i think).