The consensus is also to focus on sweet spot, but I’ve had a lot of luck going with more of a traditional base approach. For context the first plan I did with TrainerRoad is SSB-1 High Volume. For example:
^^^ read the last paragraph. To be clear, if you’ve been doing a lot of volume then don’t jump into Traditional Base low or mid volume and expect FTP increases. One of the advantages of Traditional Base is that it is relatively easy to add strength work.
The other plan that looks interesting for adding in strength work is the Full Distance Triathlon plan, because its built around doing additional work (running and swimming).
Food for thought. There are a lot of factors to consider, and its really hard to provide specific advice without doing a deeper dive (what a coach would do). Hope that helps.