If you want to get into the nitty-gritty details, there is still a gear check on the tank (before the Boss they'll need to be able to withstand not being oneshot with 8 debuff stacks) and the Healers (they need a certain amount of HP to survive the enrage damage before the heals kick in) and a need for some decent means of MP management.
The enrage strategy just makes the boss fight simpler to handle mechanics-wise with a specific party composition. Because you trade having to worry about Silencing, Dodging or passing Allagan Rot around for a Healer gearcheck and staggered Manasong.
(The more recent teams I've been in actually wait until 2-3 clicks remaining to go in and start wailing on the boss. Rot gets passed once between the right people and then they all stack up and let the enrage happen before he hits 50%. Whenever the entire team is stacked up for AoE heals, rot isn't an issue anyway as it automatically passes between the right people. Getting him down to nearly 50% before the enrage hits means that you can build up a Limit Break, bring two tanks again and don't even need Manasong - but ADS' more annoying abilities are avoided/negated and there's no chance of missing a silence in the later stages)