yes. arrow, knife, shower of rocks and time strike are all wdm (weapon scaling) procs, therefore they will scale perfectly with a maple bow's fire dmg dex convertion.
the 400-600 flat fire dmg isnt an affix, its innately part of sacred maple bows. there is an actual flat fire suffix but its tickle dmg. as for the suffix/prefix, a craft can have 2pre-2suf, 3-1 and 1-3 respectively. it doesnt have to be 2-2. so you can absolutely find sk, efr and as. that said, itll be very rare and it still wont beat the very easy-to-find
Zephyr
Zephyr
Maple Bow (Sacred)
(Druid Only)
Required Level: 100
Required Dexterity: 600
Item Level: 105
Innate Fire Damage: (62.0% of Dexterity)
+1% Attack Speed per 25 Dexterity
Adds 450-650 Fire Damage
-(15 to 30)% to Enemy Fire Resistance
+9 to Heartseeker (Druid Only)
+9 to Cascade (Druid Only)
10% Chance of Crushing Blow
+25% to Summoned Minion Resistances
25% Magic Find
Socketed (6)
.
for future questions regarding craft affixes, you can check out this page:
https://docs.median-xl.com/doc/wiki/affixesuse the affix search bar, it makes pinpointing specific affixes very fast.