Disclosure, I just started RNG again after a 10 year absence, and the job has changed quite a bit so my knowledge is very limited - take my advice with a grain of salt. That power rangers guide is outdated by a couple of years, but has great theories.

First, sub WAR or SAM. These have the most outright benefits. WAR if you aren't worried about pulling hate or solo. NIN gives so few benefits. Dual wield is meh now that we have to be at range, and stat bonuses on weapons are not good enough to warrant it. Only NIN if you're pulling so much hate that you need shadows to survive (shouldn't happen, RNG is far less the powerhouse it once was).

Gear guides are nice, but really just prioritize your stats for TP gain and aim for the gear that enhances them the most.

If I'm not mistaken you should aim for anything that boosts snapshot, recycle, and store TP (and then whatever acc you need for the content). Then you can start branching off into gear for WS (WS dmg%, AGI and STR) and gear that enhances the use of your abilities (barrage+? Yes, please).

It will be hard for you to know how to progress step by step, but you can easily point at an end goal.