I'll second Seminole's comments. I'm running TMO and RSRD (1.4). I've only run into warships occasionally and TFs very, very rarely. I don't engage warships as a rule usually cuz they're too far away and moving too fast. I tend to stay close to my assigned patrol area unless I have a strong lead taking me somewhere else.
The closest I came to engaging warships was an apparent TF in the Bungo Straits. I was patrolling the mouth and picked up a couple of small carriers with a substantial escort. I closed as quickly and stealthily as I could but had to go to flank to even have a chance. This promptly caught the attention of the escorts and I was forced to dive. Once underwater there was no way to keep up and by the time I was able to resurface they were long gone.
