Yes, to summarize, the smart things said were:

- Use flash to AE tank. If you can do AE speed runs in WP without using flash heavily as a PLD, you are the best FFXIV player ever. And no one cares.
- Use flash to blind. Even on single target bosses - its another great mitigation tool. EVEN IF YOU AREN'T THE MAIN TANK. Be careful of diminishing returns though.
- Use flash to recover TP. On titan, I sometimes get low on TP, so I just spam flash for 4 GCDs, it keeps a nice flow of enmity going while allowing you to get TP up. I even do this on WAR.

Stupid things that were said:

- Don't use flash.

ASIDE: My favorite opening combo as a PLD is Flash>CoS>Flash>SW>Flash - that takes roughly 6 seconds and gives you a nice both single target and AE enmity lead.