WRAR. Some questions.

[Zeronic]

I had been working on warrior before the patch for a while. But them stupid fates and a lot of work made sure I was only able to cap my bard every week and never spend much time on them. Now with the bonus exp from dungeons she goes pretty fast. I love gearing my characters and running coil and seeing tank loot go past me makes me cringe.
With that I have some questions for when she reaches 50. Gear and skill related.
1. Flash vs. overpower.
What's the big difference? Besides that flash hits around you for MP and Overpower in front of you for TP. I only use it because it doesn't cost me TP but perhaps I miss something here.
2. Flash is a an X class skill. I also have Internal Release, Featherfoot, Convalescence and I will get provoke (once I will level gladiator.. ungh T_T). Should I stick with this?
3. I got the basic combo down pretty much. And there are enough posts about it. But when should I use my buffs (I have an attack macro for all chars and a def one). Can I just use them in whatever order on normal bosses. Should I specifically save em (like Thrill of battle before big hit) or should I just rotate trough em
4. Is it worth it to macro some skills/buffs so healers or other classes can reply to that? (Lets say /p Thrill of Battle used, stoneskin effect up? <<se.6>>)
5. Gear. I use Ariyala's one http://www.ariyala.com/ffxiv/gear.html?2862943484.5381.
Right now I Got:
Bravura Zenith
Allagan helm
Warrior's Cuirass
Warrior's Gauntlets
Allagan Plate Belt
Heavy Allagan Cuisses
Heavy Allagan Flanchard
Allagan Choker of Fending
Allagan Earrings of Fending
Hero's Bracelet of Fending
Hero's Ring of Fending
Allagan Ring of Fending
HQ Finger Sandwich
Should I change this list? And what Myth gear should I grab first (saving zenith for last)
Thanks for your help in advance ^_^