Index / Match multiple criteria and multiple results

[Glasgowsmile]

I have a spreadsheet using the following formula but I found that some users of this report are on Excel 2016 and cannot upgrade so I have to use something older like Index / Match to mimic these results.

=IFERROR(IF($B$4="","",FILTER('Data'!$J$2:$J$32851,('Data'!$A$2:$A$32851=$B$4)*IF($B$5="",1,'Data'!$B$2:$B$32851=$B$5)*IF($B$6="",1,'Data'!$C$2:$C$32851=$B$6))),"")

$B$4 is required (It's a date field) to filter the sheet but $B$5 and $B$6 are optional. I prefer to keep it that way if possible.

I'm currently using this since there are a lot of results possible results for each date.

=IFERROR(INDEX('Data'!$B:$R, SMALL(IF($B$4='Data'!$A:$A, ROW('Data'!$A:$A)-ROW('Data'!$A$2)+1),ROW(1:1)),1),"")

I tried something like this as a test but it's not pulling just $B$5 results like I expected: I think this needs a match but I'm not sure how to get multiple results correctly.

=IFERROR(INDEX('Data'!$B2:$R1000, SMALL(IF(AND($B$4='Data'!$A2:$A1000, $B$5='Data'!$B2:$B1000),ROW('Data'!$A2:$A1000)-ROW('Data'!$A$2)+1),ROW(1:1)),1),"")

Little worried about performance on this too, it will go across 12 columns and could be 70k rows or more.