No problem. I think you'll find Base Offence and R&G are usually inferior tactics, but any of the others can be best depending on your roster. My best lineup in Utopia works best with Princeton for example and when I experimented in Private League last season I found that it was largely the case.
Clearly you can't play the same lineup every game because you need to manage the GS of your players, so you will need to tailor your tactics to the opponent (also to avoid being predicted).
Personally I do a tentative lineup for the 3 weekly games on Friday, based on my opponents overall strength and GS, evaluating their strength and weaknesses and selecting a tactic which makes sense for each game given the players I plan to use and the best recent lineup used by the opponent. While doing this I change my possible lineups in order to boost the ratings and avoid being caught by GDP while (hopefully) keep my players close to the 60-65 minute mark for GS. It's a balancing exercise that requires experience and knowledge of your own team on top of being able to predict accurately (CP helps for this) whether a game will be a blowout in your favour.