sometimes the spell is still cast in the wrong order and is only cast by the first available instead of following the skill order so its really just useful to bypass some hung up also not managing to be able to add any working reset=9 on /cast

Nolt possible. GSE has to follow WoW's rules and limitations of One GCD ability attempt per hardware (event) and cannot see the state of cast success or failure, or cooldowns or target health etc. It cant override the behaviour of /cast or /castsequence. These are not executed by GSE but by WoW itself. All GSE can do is ask WoW to try to execute a series of commands.