shaman dps, stop heal, cont dps macro

[Cypress]

I need help debugging my macro. I have 4 shamans 1 paly team lvl 15 ( i know way too low )
I want to spam shamman's dps rotation (key 1), but then I want one of them to stop and heal my tank (key e) then continue dps, then another one to stop and heal my tank and continue with dps etc etc.
I have keyclone and set up round-robin on key e, so everytime i press e it is send to a different toon.

This combo works, every now and then. It seems like if i press e and wait a second then press 1 it will work, but I dont want to wait a second, I want the other 3 shamans to be casting
here is what i got (mainly form the macro wiki, thx a lot btw great guide)

key 1
/assist party1
/run SetCVar("Sound_EnableSFX","0")
/cast elemental mastery
/click BT4Button28
/click BT4Button29
/run SetCVar("Sound_EnableSFX","1")


/castsequence reset=combat flame shock,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

/cast lightning bolt

key e
/stopcasting
/target party1
/cast Healing wave
/assist party1

note1: party1 is always my tank, i like using that instead of focus because i dont realy see the point of refocsing the shamans everytime i wanna use it.
note2: I am still new to this type of macros, I am not sure if i should use stopcasting or stopmacro or anything else
note3: I do not want to chain a healing click macro to 1 because, this gives me less control on when and how much i am healed. some fights i may not need any heals, some i might get 2-3 shamans healing me cuz it am about to die.