No he is saying you need a few key skills to be the most effective tank in the game. You can easily make due with just the Glad and shield skills @ 50 + having CON/THM @20 and maybe adding in MRD at 20 for +10% emnity. Getting a job to 20 is a single day affair, and can be done in 1-2hours if you know what your doing. This is by no means required.
If you want to tank with zero loss of hate for the entire fight against our current most difficult NM's then you need a few cross class skills and a party who knows there head from their ars (aka they know how to avoid spamming sac3/cure3 within the first 30 seconds of a fight.
Curaga MP costs and hate generation: this is the one area i feel regarding hate generation that needs adjustment. Right now you can avoid this issue by using ranged DD's but taking a pug into the ogre fight for DD purpose is not very advisable. The cost to cure them is too high and pushes you into the arc/thm/con/tank onry mentality. I think if they lowered the curaga hate and mp costs SLIGHTLY it would be enough to help mix up the party dynamics and help get the other jobs in the mix.