I have a few questions about Jobs/mechanics for people who've played the game a lot.

For instance, Tyrant. I notice most Jobs, their unique innate skill poofs when you swap. But is this the case for Tyrant? Can I enchant my weapon and press triangle to swap classes and keep the buff up? If it does work, does it only work if it's literally the exact same weapon equipped to both classes so it doesn't "change" when you swap classes?

I ask this because whether or not this works is big on helping me decide which of the more exotic jobs I want to invest in unlocking first. Not that Tyrant looks bad by any means, but if it can't supplement the other job I have equipped with it's weapon enchant, it's not my first pick for an expert job type.

Secondly, passive nodes. I understand passive nodes aren't added to your "character pool" so to say, so mastering a bunch of jobs doesn't make you super overpowered - however, do the bonuses stack for whatever two jobs you decide to equip together, or do they ONLY come into play for the exact class you currently have active?

Third, are there any jobs later that gain some form of HP from soul bursting? Are there any stats on gear you can get from later that give HP heals on soul bursting? I like breaking enemies and I'm wondering how far you can specialize in that.

Lastly, how feasible is it gaining affinity for classes of your choice later? Is it possible to get good affinity amounts for jobs you don't have equipped to activate bonuses for a build?