Pathfinder WotR - Bestest Grabbers test

0:00 - Ulbrig (GH Shifter 9, MW 3)
1:05 - Lann (Tiger Shifter 11, ZA 1)
2:13 - Bear (Tandem Hunter Lann 11, ZA 1)
3:31 - Smilodon (Tandem Hunter Lann 11, ZA 1)
5:12 - Shambling Mound Bear (Tandem Hunter Lann 11, ZA 1)
For tests, "always roll 20" was turned on for everyone in toybox 'cause otherwise the game refuses to show log for ghost's failed "release from grapple attempt" checks.

Conclusion: Lann and Ulbrig are both good as grabbers but don't have the same kind of synergy that a rider with pet does. Bear kinda sucks because his Grabber is attached to Claws which is the 2nd attack for him which often gives the enemy time to cast a spell.
Smilodon should be ideal but is currently bugged and his Grabber almost never works.
Shambling Mound polymorph (Beast Shape 4) is overall ideal for pets atm (works for dogs and bears, bugged for smilodons, crashes the game). Dog would be the best option because he has the best STR+DEX and therefore highest CMD/CMB.