To customize a defensive type beyblade you need a smooth and heavy fusion wheel that is thick so it can with stand attacks.A good example of a good defensive type is basolt horogium,earth eagle,earth virgo and any other bey with powerful and bulky fusion wheels.The energy ring can be your favourite s it does not matter and the same with the face bolt(unless you want to use a metal face bolt that will make the beys core heavier a therefor stronger.The spin track also needs to be large with lots of weight to it e.g.eternal defence,bb from earth virgo(not sure what stands for-comment if you know)and tornado.
A good stamina type bey needs to be light.Fusion wheels like flame,evil and burnung are all good stamina type wheels even if they dont possess much strengh and defense.Energy rings dont matter but a smooth one thats not jagged is recommended and you dont want a metal face bolt(otherwise it will be to heavy)so use a normal one.Tornado,145 and tall spin tracks are all good for stamina and for the tip wd,bs and s will do the trick.
For attack types you need jagged fusion wheels like cyber(and any other Pegasus fusion wheels like galaxy),herculeo,spiral and thermal. Any energy ring and any face bolt will do and i recommend,flat, galaxy Pegasus performance tip and spiral capricorns performance tip(metal flat).