However I was wondering about being a true pet master.
One thing I didn't try out during the last Factions weekend was this combination - doesnt scream PvP anyways. But adding a big chunk of health to your pet sounds pretty good doesn't it?
Looking a little further -
At 0 BM your pet still has the same health @level 20 as at 16 BM.
Many discussions plainly suggest BM12 is all you need, don't need to reach 16.
Now you may not nab 16 spawning power for the 64% but plan to aim high. One reason though you might not burn it all out there is adding spirits that pass on health (I believe?) would also target your pet, or adding in some extra attacking spirits, etc.
I'm not immediately suggesting a better beastmaster - rangers expertise makes pet attacks cheaper >> the extra pip of a ritualist if you've produced such an attack configuration. I am however suggesting that there might be some fun to be had here - ie go for the 'attack' version of your lvl20 pet, toss in some spawning points to make them equivalent to the 'hp' version or beyond, and play with mixing in spirits or anything that works with your pet, for another flavor of a 'primary beastmaster'.
[Or at 0 BM get a 'healthy' lvl 20 pet, turn up its hp with your spawning power, with a little thought and something providing damage

Become a lot more clearer trying it in March.
[Did anyone happen to confirm Spawning power up'd pet hp?]