Yapah
Legend
With the current scaling system, rare world drops for weapons, shields, and off-hands scale as level 12, 17, 22, 27 ect and armor scales as 10, 15, 20 ,25 with +8 ilvls. So for 19s, there are new weapons that are ilvl 25 and armor that is ilvl 23. Some of the rares are originally level 15-25, those are easy to obtain, just kill mobs that were previously in that level range (mobs in duskwood, wetlands, ect). For rares that are higher level (25-35), there are mobs in Southern Barrens that were previously level 30-35, they scale down to level 25 (25-60 zone), with potential to drop those higher level BoEs at a lower level.
This is a list in no specific order of BoE's that are obtainable and some higher level BoE's (25-35) that may potentially be obtained.
https://www.wowhead.com/item=2951/ring-of-the-underwood&bonus=3941 (6 agi 6 stam, slightly better than 5 agi 7 stam argas)
https://www.wowhead.com/item=13094/the-queens-jewel&bonus=3941 (6 stam 6 vers 2 int, BiS FC ring along with WsG ring)
https://www.wowhead.com/item=13005/amys-blanket&bonus=3941 (6 stam 5 vers), high stacks, FC cloak
https://www.wowhead.com/item=1716/robe-of-the-magi&bonus=3941 (10 int 9 stam 3 vers)
https://www.wowhead.com/item=2800/black-velvet-robes&bonus=3941 (10 int 9 stam, robe of magi is lvl 35 so it might not drop ilvl 23, this is the next best robe)
https://www.wowhead.com/item=13103/pads-of-the-venom-spider&bonus=3941 (7 stam 3 vers 3 nature resist, high stacks, FC shoulders)
https://www.wowhead.com/item=12987/darkweave-breeches&bonus=3941
https://www.wowhead.com/item=12977/magefist-gloves&bonus=3941
https://www.wowhead.com/item=13110/wolffear-harness&bonus=3941 (10 agi/int 9 stam 2 crit, +1 agi/int -4 crit compared to lvl 19 gloom)
https://www.wowhead.com/item=2278/forest-tracker-epaulets&bonus=3941#comments (8 agi/int 7 stam)
https://www.wowhead.com/item=13129/firemane-leggings&bonus=3941 (10 agi 9 stam +5 fire resist, lvl 34 legs might not be obtainable)
https://www.wowhead.com/item=13114/trolls-bane-leggings&bonus=3941 (10 agi 9 stam, lvl 25 so legs should drop)
https://www.wowhead.com/item=12988/starsight-tunic&bonus=3941 (9 stam 10 vers, high stacks, FC chest)
https://www.wowhead.com/item=936/midnight-mace&bonus=3920 (7 agi 7 shadow resist 3.7 DPS, BiS main hand for rogue, lvl 33 so it might not drop)
https://www.wowhead.com/item=2011/twisted-sabre&bonus=3920 (3 agi 5 vers 2 stam 3.7 DPS, level 21 so BiS main hand for rogue if Midnight Mace isnt obtainable)
https://www.wowhead.com/item=13033/zealot-blade&bonus=3920 (18 int 5 stam 5 vers)
https://www.wowhead.com/item=12976/ironpatch-blade&bonus=3920 (3.7 DPS 5 str 2 stam)
https://www.wowhead.com/item=13025/deadwood-sledge&bonus=3920 (3.7 DPS 3 str 1 stam 5 vers)
https://www.wowhead.com/item=2877/combatant-claymore&bonus=3920 (4.7 DPS 7 str 7 stam 11 vers)
https://www.wowhead.com/item=13045/viscous-hammer&bonus=3920 (4.7 DPS 7 str 4 stam 11 crit)
https://www.wowhead.com/item=791/gnarled-ash-staff&bonus=3920 (4.7 DPS 7 agi 5 stam 11 vers)
https://www.wowhead.com/item=12992/searing-blade&bonus=3920 (4.7 DPS Chance on hit: 80 dmg + 78 dmg over 6 secs)
https://www.wowhead.com/item=12989/gargoyles-bite&bonus=3920 (4.7 DPS 11 str 3 vers)
https://www.wowhead.com/item=13038/swiftwind&bonus=3920 (13 agi 4.7 DPS, lvl 35 so it might not drop)
https://www.wowhead.com/item=13020/skystriker-bow&bonus=3920 (7 agi 10 stam 4.8 DPS)
https://www.wowhead.com/item=13136/lil-timmys-peashooter&bonus=3920 (7 agi 10 stam 4.8 DPS)
This is a list in no specific order of BoE's that are obtainable and some higher level BoE's (25-35) that may potentially be obtained.
https://www.wowhead.com/item=2951/ring-of-the-underwood&bonus=3941 (6 agi 6 stam, slightly better than 5 agi 7 stam argas)
https://www.wowhead.com/item=13094/the-queens-jewel&bonus=3941 (6 stam 6 vers 2 int, BiS FC ring along with WsG ring)
https://www.wowhead.com/item=13005/amys-blanket&bonus=3941 (6 stam 5 vers), high stacks, FC cloak
https://www.wowhead.com/item=1716/robe-of-the-magi&bonus=3941 (10 int 9 stam 3 vers)
https://www.wowhead.com/item=2800/black-velvet-robes&bonus=3941 (10 int 9 stam, robe of magi is lvl 35 so it might not drop ilvl 23, this is the next best robe)
https://www.wowhead.com/item=13103/pads-of-the-venom-spider&bonus=3941 (7 stam 3 vers 3 nature resist, high stacks, FC shoulders)
https://www.wowhead.com/item=12987/darkweave-breeches&bonus=3941
https://www.wowhead.com/item=12977/magefist-gloves&bonus=3941
https://www.wowhead.com/item=13110/wolffear-harness&bonus=3941 (10 agi/int 9 stam 2 crit, +1 agi/int -4 crit compared to lvl 19 gloom)
https://www.wowhead.com/item=2278/forest-tracker-epaulets&bonus=3941#comments (8 agi/int 7 stam)
https://www.wowhead.com/item=13129/firemane-leggings&bonus=3941 (10 agi 9 stam +5 fire resist, lvl 34 legs might not be obtainable)
https://www.wowhead.com/item=13114/trolls-bane-leggings&bonus=3941 (10 agi 9 stam, lvl 25 so legs should drop)
https://www.wowhead.com/item=12988/starsight-tunic&bonus=3941 (9 stam 10 vers, high stacks, FC chest)
https://www.wowhead.com/item=936/midnight-mace&bonus=3920 (7 agi 7 shadow resist 3.7 DPS, BiS main hand for rogue, lvl 33 so it might not drop)
https://www.wowhead.com/item=2011/twisted-sabre&bonus=3920 (3 agi 5 vers 2 stam 3.7 DPS, level 21 so BiS main hand for rogue if Midnight Mace isnt obtainable)
https://www.wowhead.com/item=13033/zealot-blade&bonus=3920 (18 int 5 stam 5 vers)
https://www.wowhead.com/item=12976/ironpatch-blade&bonus=3920 (3.7 DPS 5 str 2 stam)
https://www.wowhead.com/item=13025/deadwood-sledge&bonus=3920 (3.7 DPS 3 str 1 stam 5 vers)
https://www.wowhead.com/item=2877/combatant-claymore&bonus=3920 (4.7 DPS 7 str 7 stam 11 vers)
https://www.wowhead.com/item=13045/viscous-hammer&bonus=3920 (4.7 DPS 7 str 4 stam 11 crit)
https://www.wowhead.com/item=791/gnarled-ash-staff&bonus=3920 (4.7 DPS 7 agi 5 stam 11 vers)
https://www.wowhead.com/item=12992/searing-blade&bonus=3920 (4.7 DPS Chance on hit: 80 dmg + 78 dmg over 6 secs)
https://www.wowhead.com/item=12989/gargoyles-bite&bonus=3920 (4.7 DPS 11 str 3 vers)
https://www.wowhead.com/item=13038/swiftwind&bonus=3920 (13 agi 4.7 DPS, lvl 35 so it might not drop)
https://www.wowhead.com/item=13020/skystriker-bow&bonus=3920 (7 agi 10 stam 4.8 DPS)
https://www.wowhead.com/item=13136/lil-timmys-peashooter&bonus=3920 (7 agi 10 stam 4.8 DPS)