I have never used that wedge you are talking about. Best 3 wedges are the Zsatin 50, 77, and 90. the 90 yd wedge takes some time to get to the tier you need but the 98 yd is also good. Bollox is right there is a great article on chipping and pitching but the quick rules I follow are.
1. If more than 2 feet from green pitch do not chip.
2. Always, always put backspin on the ball
3. Pay attention to the lie on the rough
4. Pitch will roll 4-5 feet further than your footage you hit, chip is about 2-3.
5. Learn to use the flop shot. Do not stop on the ding line on the down mark but click early on the first line where the blue starts (line left of the ding line). This will keep the ball straight. Flop ball will roll about 4-6 feet depending on the lie
6. Always, always use backspin on the ball. (thought I would re-emphasize this)
7. Learn to chip out of the fringe. This is one of bollox and a few others pet peeves since they made the changes, 96% of time I will chip.