maybe like this,
For point 1 - It dependson on the dimension type which are using in the chart. If it is not a time dimension then your aggr numbers by month wil give more accurate numbers.
For Point 2 - Take a 'combo Chart type' and use the primary and secondary axis. one you can show the %'s and other for numbers.
For Point 3 - use the <min(time_dim) in expression. by default it will show 0. if you select time filter then it will gives you the numbers.
Thanks for your response.
Unfortunately these do not seem to be achieving the desired outcomes/
Pt. 1 - I am displaying a number of months , and then 'results' across these months in the chart. When I filter the chart using a certain KPI (by filtering), I want to make sure they sum the KPI, others I want to Avg.
Pt. 2. - This seems to suggest I need to setup KPI's that are %'s as a different Dimension, and KPI's that are no.'s as their own dimension, rather than just having the KPI name as a field that can be filtered to change which KPI is on the graph? Isn't there a better way, so I can just 'filter' and it correctly show %'s or No.'s?
Pt.3 - I tried this - however when filtering it still shows 0.