Defensive Rubbers

I will not call myself a professional defensive player but,yes i can defense pretty well with my current 2.1m inverted rubber(they are pretty slow).

I'm now thinking to take myself to greater level...

So which type of rubber should i use and of what thickness and why do people around suggest me long pips but i prefer normal inverted one's (will it be good) and btw...sir, i have seen that video in which you explain the difference between different type of rubbers, as i remember you mentioned long pips couldn't spin the ball well, so why people suggest to use long pips.