Quote from superfulaWith the correct spells Bears and Bats are almost spammable. VQ is a passive and Bears don't have a cooldown, so this 'can only dps effectively every 2 minutes' statement of yours is vastly wrong. The fact of the matter is that it works for plenty of people.
For me, Bears and Bats are spammable, unless under Frenzy Shrine or BBV effect. Although at the moment, I do have a little to much MPS, 200, with VQ up. Regardless, I've used Bears/Bats in Act 2/3/4 and the pony level with great success. http://us.battle.net/d3/en/calculator/witch-doctor#ckUTQP!UVe!aaaZbb
Sometimes I swap Garg for MC with cd reduction rune or for Hex with increased dmg rune.