im a nuker, i have 3 imbues
1st reason is "target specific"
ice for red mobs or when mobbed by orange/red giant/champs
light for high-hp single giant, strong mobs
fire when you feel like it
2nd reason is "anti-boredom"
light when you get tired of hearing the ice imbue sound
fire when you get tired of hearing the light imbue sound also
ice when you get tired of hearing the fire imbue sound too
3rd reason is "old school pvp (ice)"
for people who just emptied their pills / or has none / or forgot
for people who just don't get cold immunity
4th reason is "funny screens"
ice imbue when fighting giants, real nice freezing poses for fun
5th reason is "trade runs"
in Athens, i noticed Anthony_HOP (famous for being an all-day hunter escort) using ice imbue as a trade caravan (very many ox's) nuker escort, i tried runs with each imbue. ICE is the best for trade runs against NPC thieves, try it yourself so you'll know why. (Lv5 ice mastery + book1 Lv1 ice imbue is so cheap to curst anyway)