Affix question on Masters crafting

Hey forums,

I have a dagger that I have pretty well pieced together to be a 5 affix dagger. Info below.

Onslaught Needle fiend dagger
inherent mod is 60% crit strike change increase

the other 5 mods are:
42% increased spell damage
161% increased physical damage
21% increased crit chance for spells
20% crit multi
+367 to accuracy rating

From the wiki, I found that the crit chance, crit multi and accuracy are all suffixes, leaving the chance for putting some flat damage on there as a prefix and really making it good. Only, after leveling vorici to 4 and trying, i found that the weapon supposedly had too many mods to craft another one on.

Can anybody tell me why this is? Do I need to level him up more to allow more mods? or is there a limit that i am not seeing?

Any help would be appreciated.

Edit: Vagan, not Vorici.

it has 6 affixes

prefixes:

% phys damage
% phys damage/local accuracy
% spell damage

suffixes:

% crit multi
% spell crit cahnce
local accuracy

Ah i see that would make sense. thanks