As far as Radar Derp/Seismic vs. other stuff ... I just feel like those are universally useful things, whereas I don't think I'd get a very good return for those nodes from the other trees.
Besides, it feels to me like we have so many nodes to play with, we don't really have to make those really hard choices.
Just looking at my Crab 27 tree as an example -- after unlocking most of the sensor tree, I can still get ALL structure bonuses, a lot of the weapons tree, almost all heat nodes from operations, and a few mobility nodes.
If I felt like I was seriously lacking in other departments, I'd consider going without full Radar Derp/Seismic -- but typically I don't.
Edited by jss78, 06 July 2017 - 04:13 AM.