OP, I am gearing for titan HM now. I have beat Garuda and Hydra so Titan and Coil are all the challenging content that remains for me currently. There are more experienced players than me but this is what I recommend for gear requirements:
Castrum, Praetorium - AF gear and iLvL 44 weapon
Ifrit HM, Wanderer's Palace - AF gear and iLvL 55 weapon
Garuda HM, Ampadoor Keep - mix of DL/AK/AF gear and iLvL 55 weapon
Titan HM - mix of DL/AK gear and iLvL 70 weapon
I think most people will agree there's not much of a gear requirement for CM, Prae, Ifrit, and WP. You should farm these dungeons for better gear first then move on to the later content. However, jumping into Garuda or Titan because you don't want to wait anymore isn't smart IMO. For example, I have around 4700 HP (out of party) as a tank in Garuda so I am perfectly capable of off-tanking there, maybe even main tank but I am still learning the fight and usually get bad DF teams. If the group fails Garuda now, I am usually not the weakest link. Nonetheless, I have only beat 1 out of 15 Garuda HM attempts with DF players because they are under geared and don't know the fight. I have never been "elitist" or anything in my ARR journey up to this point. I have never left because players are under geared or new. However, I might be dropping out of Garuda if we wipe more than once now because of the most common problem: poorly geared DPS. Please continue trying to gear up in the entry level 50 content before you progress. It's sad that people aren't accepting you because you can't speed run as fast but you will experience even more frustration and cause more frustration if you queue for higher level content like Garuda and Titan.
