How to cull different indexes of different branches

I looking to do selective culling of different branches with an solver such as Galapagos - looking to use the gene pool component. 

I realise its possible to select each branch and cull the index, but when working with 100 over branches. I was wondering if there is a more efficient way. 

Apologies if this might be a trival issue. Still fairly new to gh. Thanks all for the help!