Hi guys i actually farming sealed blueprints.
This is the list of mobs has 1% drop
Vicious Undead Warrior lvl 57 - ascaron (sacred forest near portal to DW)
Black Finned Shark lvl 53 - ascaron (2438/3344 - 3038/3672) sea mob
Sakura Pirate Militia lvl52 - Glacier isle
Frenzied Wolf lvl 51 - Zephyr isle
Vampiric Polliwog lvl 55 - magical ocean (1011/72 - 2046/609) sea mob
Skeletal Warrior Leader lvl 59 - ascaron (320/1380 - 400/1500)
Jack the Pirate's Command Ship lvl 52 - magical ocean (1832/2300 - 3392/3938)
Topaz Dolphin lvl 57 - deep blue (986/1787 - 2886/3884)
Old Sawtooth Shark lvl 51 - magical ocean (1506/3786 - 1510/3790)
Bloodthirsty Hunter lvl 60 - ascaron (410/1532 - 481/1610)
Steel Mummy lvl 54 - ascaron (400/1380 - 480/1500)
Forest Hunter lvl 58 - ascaron (sacred forest near portal to DW)
Guardian Angel lvl 55 - ascaron (822/1210 - 950/1357)
Northern Pirate Support Ship lvl 59 - magical ocean (2191/67 - 3061/802)
C ya!