Tech Research Priorities

Hi all, been playing Divide et Impera for awhile now, and one thing I always struggle with is choosing what technologies to research. I am playing a Rome campaign...or trying - I keep restarting for various reasons. If I lean too heavily into econ/building, I end up behind militarily imo. If I lean too much into military, I end up not being able to afford enough armies and navies to combat Carthage. I have no issues dealing with Epirus, Etruria, Illyricum nor Cisalpine Gaul. I try my best to manage empire maintenance as well. I feel like I'm missing something and I'm leaning toward It being a research issue more than province optimization. Anyone have any tips or advice on tech research priorities or general economy tips? Thanks in advance!