ROTE TB is a pile of messy rubbish. In later phases missions literally get more difficult when you complete the platoons in operations. Fleet missions of DS in phase 1 and phase 2 are a pile of RNG garbage that haven't been tweaked EVER, even bitdynasty has trouble with both of them and he's a magician with figuring out ways to get past the apathetic RNG additions CG puts in PVE.
But, for the spectre team, I drop GL Ahsoka in with full spectre and I have the one omicron for TB and it's pretty much full auto on every mission. Spectre is good in GAC, TW, etc., as well so it might be something you want to invest in to get them to R7 and ezra to R9, Ahsoka to R10. (Though it does look like in all their wondrous 'testing' that they do, with the new updates to Ahsoka and Ezra that Mothers teams in GAC are beating the new Ahsoka Ezra at least to a certain level. So, yay CG! You took away one counter and let another one step up to take its place, allegedly! Maybe do some actual testing instead of simming your R15 teams and saying, "yep, it works. release it!."?)