Wouldn't say it's a terrible strat. Made our first kill tremendously easier. While we were progressing on him and after numerous wipes we decided to have tank kite all adds after the 1st set which we killed and found it much easier for the kill. Only had 2 sets of adds before phase 3. However that's probably is unrealistic with OP's dps but it's not a "terrible strat.
Also makes phase 3 go by a lot quicker with dps only having to switch targets for mcs, allowing them to put a ton more dps on the boss which is what you should want anyways.
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We were able to do it 10m with 550ish tanks at the time, not a whole lot overgeared