I just did a "control test" for Ysgramor’s birthright to see if it was working as intended and if it was better than Julianos when it comes to frost. All purple 160cp gear apart from staves which are level 1 white with no enchants or traits.
(notes: I did not have any attributes or passives or CP points put into anything and had no buffs active or any potions or food or mundus stones)
all gear was in divines because the pts automatically put them in divines so i did that to the Juli i crafted, and i also matched the yellow magicka enchantments on all of them. Jewels were all ysgramor's.
I had julianos and ysgramor’s. And what i did was i removed 1 set piece juli gloves/ ysg waist to see the tool tip numbers as they both had the same enchantment value.
Values of frost skills (which have been morphed to get the maximum damage to try and erase any weirdness but also so that they don’t buff other skills, for this reason i used permafrost over northern storm)
Key:
Y4p: Ysgramor’s Birthright is at only 4 pieces, Julianos is at its full 5.
J4p: Julianos is at only 4 pieces, Ysgramor’s Birthright is at its full 5.
Both Sets: Both sets are at full 5 pieces.
(notes: the listed value, unless specified is always frost damage.)
Normal skills:
Winter’s Revenge:
Both sets: 690
Y4p: 576
J4p: 602
Crystallized Slab:
Both sets: 1381
Y4p: 1152
J4p: 1205
Frozen Retreat:
Both sets: 2139
Y4p: 1787
J4p: 1869
Force Pulse:
Both sets: 826 Frost, 702 Flame and Shock (880 Magic on nearby debuffed enemies)
Y4p: 691 Frost, Flame and Shock (866 Magic on nearby debuffed enemies)
J4p: 723 Frost, 599 Flame and Shock (750 Magic on nearby debuffed enemies)
Blockade of Frost:
Both sets: 668
Y4p: 558
J4p: 583
Frost Reach:
Both sets: 1604 initial, 2125 DoT
Y4p: 1340 initial, 1780 DoT
J4p: 1402 initial, 1855 DoT
Frost Ring:
Both sets: 2142
Y4p: 1790
J4p: 1872
Ultimates:
Icy Rage:
Both sets: 2702
Y4p: 2257
J4p: 2361
Permafrost:
Both sets: 1425
Y4p: 1191
J4p: 1245
Ice Comet:
Both sets: 5306 initial, 1537 DoT
Y4p: 4433 initial, 1284 DoT
J4p: 4637 initial, 1343 DoT
Findings:
At least on these specified morphs, the Ysgramor's Birthright Set DOES have an effect. however it is slightly different to what is specified on the 5 piece bonus (Adds X Spell Damage to your Cold Damage abilities.). According to Force Pulse, it ACTUALLY does this: "Adds X Spell damage to your Skill's Frost Damage". I would assume it acts the same way with Silk's Of the Sun, Netch's Touch and War Maiden too. This set is not bad in of itself, but is let down by the lack of good frost damage skills which is outside of it's control.
If you want me to post the other Morphs, say so and ill do it.
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