I ran an experament to see if block items stack.
Methodology:
- Equip as many block boosting items as I can on my tank
- Take the tank and a healer to a fight with an archer/gunner
- Kill everyone but the archer/gunner
- Continually run the tank to the corner furthest from the archer and start counting
- Count every attach which does not miss. This means the ones that are either blocked or do damage. I found that not healing except to avoid death makes it easier to count.
- Count the blocks
- When the total count got to 50 I stopped and record results.
- Repeat after removing all but the best block enhancing item.
Results
Base bonus + 40% skills bonus + items 24% + 23% + 22%
-blocked 9 out of 50 for 18%
Base bonus + 40% skills bonus + item 24%
-blocked 13 out of 50 for 26%
Conclusion
Just like casting and attack speed. Block does not stack.
I'd like to repeat this with hit-rate, aim, dodge and critical hit bonuses but I lack the variety of items needed to run the experiment. If you give it a try please post. If you see a problem with my methodology please post. Once we get a set of results together we can add to the FAQ.
Comments
http://ggnbb.glu.com/showthread.php?17631-Accessory-Items-STACK
Same with speed increase. I have 220% and 240% ony casters and I timed their cast speeds with 0 gear to full gear. It was only about 100% faster if that.