The 100 fire would give good mag. defence(277),
good damage (about 10% more than light imbue)
a fire wall
and some phys damage (+19%)and 60 ice would give you a good enough snow shield to tank pretty well (40%)
defence wont increase too much (about 84)
and a little ice wall to take the 1 phys hit or to be immune vs warlocks for a whilelight 40 would give you10% higher mag. damage
47% more speed
21 more parry (passive without the buff [not worth it])
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All in all it is a very powerful damage dealer, you could even 1 fire nuke for damage.
the downsides are:
-not much survivability without a shield or heuksal passive
-lack of phys. defence
-moderate mobility
-after lvl 100but:
-all bowers have a lack of overall survivability..
-you can make up for the phys defence by going at least protector,
-and lack of mobility isnt bad if you have money for some drugs of wind
or grind in an area where you dont move much anyway
after lvl 100 though, with maxed bow and fire you will have to dlvl at least 20 skills from ice and light, so you will either be missing some defence and snow shield, or speed and mag. attack________________________________________________________
I am going about the same 1:4 int build on my ff 100 char
and have considered going the fire way
but--> i am taking 100 bow/light and 80 ice
because after lvl 100 i wont have to dlvl anything, only max bow and light
and after 110 i will make up for the loss of phys defence with a prot/armor set or go more to the 70:70 balance instead of 60:84 balance