Too much RNG in ascending

Trials of the Sekhema and Chaos are genuinely fun to play, in the end game - but ascending with them really is a dreadful experience. Why is there so much RNG involved in the experience of ascending?

* Avoid run-ending debuffs in Sekhema
* Tornado bird boss in Chaos
* Half of the Chaos debuffs in early game are run-ending
* Dropping the right level of trial

As well as many other elements.

Ascending should be challenging - sure - but it should be a consistent experience whenever you try to do it.