I need to get 40 more myth before Tactics ends. I haven't done many elite dungeons so I should be able to. Not sure if I want to do x50 pull or just stick with x15. I know you get a free piece with 50 but I've never had any luck with those. x15 though I always seem to get something.
Hard to tell when we are in a winning streak or no.
Since SSSB fest till Auron banner, I was definitively in my max of luck. Since FFT, my luck drastically fall off.
At least synergy is always good otherwise I would have give up of those banner without wasting my resources.
FFT synergy wont be that much important for some time though so you can always postpone your pull next BSB or FFT event.
The only answer in the end is to pull in the banner you have most wanted item, so you can have 3/4% chance to be happy instead 1% if chasing a single relic.