Blocking in Dissidia is skill-based not character-based (unless you count ExDeath) Know WHAT your opponent can do, block them up close, BRV to HP, profit!!!
Dissidia didn't have combos it had traps. The ONLY combos in Dissidia were Brave to HP links. And those to EX bursts if you could. Hence why Golbez, Cloud, and Zidane ruled