'ui_combine_type' determines if an ability shows up at all when several different squads are selected. This doesn't really matter for what you want to do.
Whether an ability is activated on all selected squads or just one of them is decided by 'ui_group_cast_type'. In your case, the value should be 'multi'!
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#Steam AliasWL%Streak
- 1.831222.789+37
- 2.600215.736+15
- 3.34957.860+14
- 4.1107614.643+8
- 5.305114.728+1
- 6.916405.693-2
- 7.273108.717+24
- 8.722440.621+4
- 9.1041674.607-2
- 10.17146.788+1