Thank you everyone for you feedback so far! I will be sure to include them all when the next version comes out. I might make it so you have to airpogo everything and you don't get overheal for demo 
For 2nd last, I strongely advise against using that mimic rocket entity. Offline you can get direct hit by the bundle wich gives a significant bigger knockback since they are considered enemy rocket. On tempus, the rockets won't direct hit you so you'll have to get a good enough wallcatch to slow down enough, and thats impossible to test if your mimic settings are good enough for that, since you can't test that offline without getting direct hit. I learned my lesson from xhappy last to never use those for precise hard syncs. And like Finn said you can sync a rocket + shotgun on the button and make it directly to the end from the sync.
What should I use to spawn the rocket instead? Unless this jump will never work in the first place on tempus?
Alright so I tested a few things to try to duplicate your own rocket but no success. Seems like there's no way to put a rocket in a point_template dynamically and forcespawn it, if the template doesn't exist on map load nothing happens. I also tried putting a tf_projectile_rocket in hammer and using a env_entity_maker to make it spawn at correct angle and velocity, but even with collision to none it still direct hit you, and it does absolutely no knockback. Even with the local velocity property set to 99999.
To keep your jump exactly how it is, there's "maybe" a way to simulate the same effect by putting a rocket teleport in front of the button. Button would do nothing but be there to show you have to shoot at it. rocket would then teleport at the same place you had mimic rocket spawn. then to give it a bigger knockback for a triple or quad, you can have the wall it explodes on be a button that enables a push trigger or a point_push. point_push might be a better idea since if youre not directly infront of the explosion it would push you sideway i think. You would have to do a lot of push setting trial and errors to see what works/if it works tho. Also if you're going this way, rename the rocket that gets teleported so only that rocket can trigger the button.
another way of doing it, probably better than goblin point_push, would be to have the player fall down somewhere or go on a conveyor of 1100u/s, any method to make him perfectly bundle 3 or 4 rockets, then you teleport the rocket to where the mimic spawned, and the player back at the beginning. So you have the same exact thing, except the player has to shoot the rockets himself. You could even make the player teleport on the other side of the jump so he prefires directly to the wall without needing to teleport rockets.