I can regularly get my lairshaping to 1541. This is using scales, biped buffs (The ones in this picture are T4... couldn't find any higher at the time) pow and str potions. (crystal pictured was a focus crystal for crystalshaping I think)
Went out and tried to see how high I could get as requested.
Best I got was 1578.
Gear:
Headscale:
+20 to LSH +65 Pow, +55 Str (made a new one with jewelry sockets instead of the teched one used in the first trial)
Forelegs:
+20 to LSH +55 POw +55 Str
All others are teched with +20 LSH 25 POW and 25 Focus.
Claw:
+65 focus +65 Str
Adds:
Promote Vitality, Determination
Consumed dark periodot crystal (+110-165 pow)
Knutt's firewhiskey
Bolster Pow, Str and Focus, Elixer of Saris Spirit (+50 to dex)
Enhance Str, Enhance Pow, Surge of Str
T6 machine
Improvements:
Can socket the chest scale to get crystals with Pow and Str instead of techs that only add +20.
Claw could use +65 to pow instead of focus
Claw could be teched with +20 lairshaping instead of the third crystal.
Both forelegs (and corresponding chest scale) could have level 100 crystals instead of 80.
Headscale could use a level 100 str crystal
Could use a real dex potion -_-
With the claw teched with lairshaping alone, that's 1598. Fix one of the afore mentioned crystals and you have yourself 1600. I wouldn't tech my claw with lairshaping though as I do not need it. Most a dragon ever needs is 1425 in LSH free standing (no machine) sadly.