Congratz on 50. I hit 50 not too long ago so I think I can help.

As long as your jewelry is "reasonably" upgraded, you have your i55 weapon you'll do just fine in WP. Why are you being told you can't handle WP? Because everyone wants a speed run which requires significantly more gear.

You SHOULD start running Wp after Wp after Wp get Philo gear. The warlock gear that drops from WP is all but worthless with th exception of the hat I believe so sadly you won't really get any gear upgrades from the dungeon itself. Everyone has a different strategy but I decided purchasing the accessories first with my P-Tomes, well belt was actually first then onto accessories. Some people say go for the big ticket items because it's a big ugrade but that wasn't what I personally did.

Also, work on getting HM Ifrit down then start farming Garuda for her weapon. You'll be amazed how much of a difference it'll make!!!!

GL