First and foremost, that tank is an idiot. Enmity means very little in relation to damage. Bard is among the weakest personal DPS jobs in the entire game yet generates the highest enmity by a mile. His remarks on Division only solidifies he knows absolutely nothing about Monk as that role skill is basically mandatory. At least when paired with a good tank that doesn't stay in Shield the whole fight. As for testing out your DPS, the best alternative is to ask a friend on PC to party with you. That way they can parse and provide you the results.
Except that is basically what Red Mages do? The only deviation to Scatter spam is Enchanted Moulinet and Contre Sixte. As the former is dependent on mana and the latter a oGCD, you'll spent most of your time spamming Scatter. Running out of TP on Paladin is expected during big pulls. They have no means of regenerating it and Total Eclipse devours TP.