Close to the table topspin

A year ago I was using a premade bat which isn't as fast as the current bat (the basic jonyer ply +mark V max on both sides).  I was used to fast, close to the table rallies and had not really developed the concept of using considerable topspin  .After a lot of practice I am now able to play topspins from my forehand with reasonable control and accuracy.  But now I am unable to counter-hit and counter-hitting rallies seem like unfamiliar lands (It's ironic) and  prefer loop-rallies from a distance.  Being an attacking player I find it necessary to have the ability to attack from near the table as well  (It will also indirectly add to my defense, after all, a counter-hit or block which is low over the net and long can only be attacked with topspin;an area I'm comfortable with). So how do I develop playing close to the net fast rallies especially countering a counter-hit without losing my touch on topspinning.  Also, please give me tips about the ready position, shots I should use and how I should chose between the loop and counter-hit against my opponents shot.

PS:I'm sorry for the long back-story but i thought giving you an idea of my present skills and circumstances would give you a better idea on what and how I should work on in my game.

Thank You