Board Thread:Game Discussion/@comment-69.76.179.45-20130802120253/@comment-4199297-20130802152109

1) no, fusing never results in a plus armor.  Other than the higher stats when wearing it, there's no advantage to a plus armor.

2) the level of the resulting armor is the average of the level of the 2 source armors and that's the only thing level does.   ("I got my wanted armor because I leveled the source armors" very likely falls in the same category as "I won the jackpot because I used my lucky numbers")

3) listed at: https://docs.google.com/spreadsheet/ccc?key=0AiQKRFnZ9_jpdEFtUUVnd2dQM1ZIX2IxT1RNZVlvalE#gid=0 for the time being.

4) see 3) and http://www.funzio.com/forum/showthread.php?52470-Armor-Leveling-Research.-Please-Contribute./page17

All that kind of info should hopefully one day be added to the wiki.