The fact is, all of the pet jobs (including drg) have different strengths and weaknesses and pet AI plays a huge part in that. A common complaint for bst is that their pet will switch targets on its own, a wyvern or puppet don't. Smn avatars have crap HP, the other 3 pets are all better at taking hits (although titan can take a pounding... for an avatar). Puppets deal terrific damage without pulling near the hate of jobs they emulate. Any of these can be factored into a proper party build where the focus is to fill holes in the roles of members.

Now, my only capped pet job is beast, I'm leveling pup but it's currently only 26. In Abyssea I'm using all 3 level 75 expansion set pieces (ASA, MKT, ACP) with pet buffs and beast affinity 5/5 merits. It's costing me a fortune in jugs. With Atmas on I haven't found a player yet that can get hate off my pet for more than a couple seconds unless they brew! Unfortunately, my LS rarely targets NMs that drop bst stuff so I haven't been able to get gear that augments me and gets hate (and thus survivability) to reasonable levels. We usually pet burn the tougher NMs with most pets being SMN; I hate bringing my beast to those sessions because I usually end up going through an entire stack of jugs in 1 2hour run since the only way I can heal my pet enough is to flux out since they can never get hate.

I'll get to use the same gear on pup when I reach that level unless I manage to get my full relic ( and might still use those pieces that are better). Some gear that will let me manage things on the hate front by balancing strength between me and my pet would be appreciated.