Some may know these spots already but for those who dont, here is a useful list of spots for easy farming/catching of aggressive mobs. I'll update as I find them.

Had a few close deaths gathering these

The list isnt complete yet, and there was a couple i couldnt find if anyone can supply them.

 

 

Arcanois Region

Snowdrift Tarkuso (-572, 373) (Mixed Group with Saberclutch Bullero's, and Jungle Brutes)
Alabaster Terrapinace (-447, 493)

Elephunc Region

Mire Golem (-524, 563)
Sharazad Broomrider - (-698, 443)
Fiesty Whelp (-424, 825)
Giant Gator (-380, -109)
Tomero Cutlass (-440, -188) (Mixed Group with Ironback Iguana & Snoredust Venobloom)
Snoredust Venobloom (-460, -245)
Tusko Rampager (-475, -857)
Admanto Shell (-768, -773)
Glowtail Scorpicrab - (-746, -732)
Nydian Crawler (-686, -102)
Carnivorax (-736, -278) (Mixed Group with Nydian Crawler)
Terracotta Terror (-62, -743) (4 groups, each mixed with 1 Admanto Shell)
Undan Drakeling (-143, -528) (All mobs along the small section of Shoreline)

Gallio Kingdom Region

Hairy Pink Rhino (137, 132)
Cuddly Canjin (278, 152)
Coccoon Cutie (233, 239)
Shaodu Cub (129, 52)
Toadsy Crimsonkin (335, -23)
Erugan Mauler (331, -225) (Has 1 Bamboorax Dancer in the group)
Azure Pegasus (-37, 154
Portly Snowhawk (-134, 34) (Mixed with Camtavian Smokeshell & Azure Pegasus)
Cyclopean Scout (-280, -261) (Just 2 mobs)
Minimain Maiden (73, -360)
Ghostclaw Daifu (13, -118) (Mixed with 1 Cyclopean Scout)
Bamboorax Dancer (116, -336) (Mixed with 1 Shaodu Cub)
Camtavian Smokeshell (89, 125)
Masked Menace (Still Looking)
Leopardo Assassin (-61, 455)
Pistilpox Siren (Still Looking)
Clawpus Cobrahead (200, 319)
Cerberian Hound (275, 310)
Fluffian (-179, 350) (Has 1 Foxero Guardian in Group)
Foxero Guardian (-276, 382) (Has 1 Fluffian in Group)

Judium Region

Waxbrain Golem (766, 139)
Balang Foreman (356, 150)
Balang Kulii (350, 115)
Tigero Ranger (559, 104)
Lulang Temptress (759, 309)
Peachtail (731, 552)
Bloodsucking Bureaucrat (759, 909)
Grezling Intruder (876, 655)
Rustshell Minion (379, 806)
Crimleaf Elder (492, 865)
Crimleaf Pollinator (258, 661)
Disgruntled Poet (308, 852)

Amaz Region

Buffallero Jock (-646, 722)
Quicksilver Niburu (-521, 816)
Motley Fenican (-459, 668)
Sharpshooter Swinehog (-233, 626)
Bandit Wench (-671, 494)
Lamian Huntress (-200, 311)
Sparklebright Pea (-611, 275)
Tomero Gilgunner (-265, 254)
Rhinon Bonebelt (-730, 731)

In Amaz & Judium regions the "Green" Mob links in quests are good at taking you to these spots.