[1.0.0.9] Shadowstrike Spellbreaker: 17s Dummy, 4s Madqueen, Kill Cronley before his Maiven's

[Elementoid]

Any chance to build devotions through Turtle (bound to Veil of Shadow) and Tsunami?

Turtle is not an optimal investment for this setup, or any generally. While its base nodes are decent at best, the skill is extremely underwhelming, as 2700 damage is very unimpressive in actual combat, especially factoring in the relatively long recharge time of 30 seconds. I believe Ceno also addressed this in an earlier post (in response to an argument saying that Turtle is good because it effectively acted as a 25% hp heal):

[1.0.0.9]2 devotion skills

Not really though, as it’s nonrecoverable.

Healing 25% health is nice because if you then lose some of that health - say, 5% - you can still regain that and more at any time via ADCtH, an on-demand heal, passive regeneration, or some other proc.

Receiving a ‘shield’ of 25% health is merely a buffer that, once initially partially depleted, serves no further purpose. It’s nice that it ‘protects’ your health pool, meaning you can theoretically use any of the aforementioned means of health recovery to carry you further, but it must not be confused as a heal in and of itself.

As Norzan explained, because 2700 health is a cakewalk for tougher foes to break through, it is unlikely to remain up for very long at all, especially if you were already thrust into a situation that made the skill proc in the first place.

As for Tsunami, its nodes give damage that are irrelevant in the later stages of completion for this build. That combined with the trouble of re-arranging devotions to fit in Tsunami (which will no doubt end up being inferior to the original) make the constellation not worth taking.