They already have higher def than DPS classes. That shouldn't mean that Namekians are also gifted with good, Legendary gear.
Sorry mate, but if you want the best gear with def, craft CC Black Set lvl70, it have 800 pdef for MA and 800 e def for spiritualists.
If you make DPS classes have same gear as tankers then tankers won't be tankers anymore.
Plus you can obtain high energy def gear from TMQ already and it is enough.