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                                    How about "Master Bell & Whistle Buyer" ;-D 
                                 
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                                    The IDC I am doing includes MSDT Prep with 5 Specaility instructor certs. So I was trying to get honest suggestions ... My bad 
                                 
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                                    Might as well throw in Self Reliant Diver. 
                                 
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                                    > The IDC I am doing includes MSDT Prep with 5 Specaility instructor certs. So I was trying to get honest suggestions ... My bad
   Sometimes wisdom is offered as humour. 
   Maybe a more politically correct answer would be what skills would benefit my students in my area or for their desired areas. 
   But, I’m not very politically correct, likely to give answers / honest opinions that some may not like, tact attempted. 
                                 
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                                    skip multilevel and naturalist take Altitude, wreck, search & recovery, DPV, O2 provider, U/W Digital Photo and Video 
                                 
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                                    I actually had a lot of success with U/W Digital and Video photography. 
                                 
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                                    My vote goes to the following, if you’re not already committed:
  Wreck Enriched Air Drysuit UW Digital Photography Search & Recovery
  Based on what I teach, Enriched Air Diver is by far the most common requested specialty and based on where I teach, Drysuit is 2nd most popular. PBB Is included with your OWSI and that’s one of my most valuable offerings as well. PADI’s UW Naturalist, IMO, is not a good value to anybody so unless you’re looking for a no-brainer cert to round out MSDT, I’d pass on it. Multilevel is only a reverberation of using dive tables that we already learned to use in Open Water Diver, and being that most divers dive with computers now days - I’d skip that too. 
  I don’t get very many requests for UW Search & Recovery, but the fundamentals taught in it are good practice for anybody who "tinkers" underwater: Be it spearfishing, lobstering, building docks, or just collecting stuff. 
                                 
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                                    The ones I see the most interest in is: Nitrox Buoyancy Rescue Deep Night Pretty much in that order 
                                 
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