Lesser Jeweller's orb priority -
Snipe ->
Ice Shot ->
Freezing Mark ->
Herald of Ice
Quality Priority -
Freezing Mark ->
Herald of Ice ->
Snipe
This is the only big swap in campaign (at lvl 31 you'll swap
Lightning Arrow for
Ice Shot). While it is a bit of buttons at first, it's not that bad once you know what you're doing.
This swap requires at least 3 skill gems (one lvl 7 and two lvl 5 or 6 gems) and 4-5 support gems. So make sure you save these gems as you're lvling, you should usually have spare gems by lvl 24. Keep in mind the lvl 7 gem Has to be
Freezing Mark and this skill is massive for freezing enemies, while giving a massive damage buff at the same time. If you have a 2nd lvl 7 gem, it should be
Snipe.
Always keep
Snipe at the highest available gem lvl you have access to and get
Lightning Arrow to lvl 7 (stop upgrading after, because you swap to
Ice Shot once you unlock a lvl 9 gem in act 3).
Frost Bomb Will only work if it's high enough lvl. At lvl 3 it'll affect enemies at lvl 25 or below, lvl 4 is 29 and lvl 5 is 32(So at lvl 5 it'll work for all of act 2). You'll drop this skill mid act 2 or start of act 3, as you'll lack the intelligence to keep lvling this skill, feel free to drop it when you swap to
Snipe if you struggle with a lot of buttons.
If you feel like you're lacking freeze buildup, remember to constantly use
Ice-Tipped Arrows as this activates
Hail. You can also use
Escape Shot to help with freeze buildup, but I never needed this in any of my runs.
Essentially the goal is to freeze the boss, press
Barrage into a perfect window
Snipe. (if you struggle with Snipe, you can takeout Window of Opportunity I for Elemental Focus, but it's not that bad).
Boss Rotation: use
Ice-Tipped Arrows before the boss spawns, cast
Freezing Mark, shoot
Lightning Arrow 3-4 times, cast
Freezing Salvo. If the boss is not frozen, use escape shot/salvo till it's frozen. Once the boss is frozen, cast
Barrage into
Snipe.
For general clear, I just use
Ice-Tipped Arrows,
Freezing Mark for the as extra buff and
Lightning Arrow(because of
Hail, lightning arrow will freeze normal monsters for the mark buff).
While I don't use it myself,
Escape Shot can also help you build freeze if you feel lack you're struggling. But
Freezing Salvo and
Ice-Tipped Arrows should be more than enough. At lvl 31, freezing enemies become insanely easy because
Ice Shot has massive freeze buildup, but
Lightning Arrow with
Ice-Tipped Arrows gets the job done.