| Spee |
Pack Lord Archetype for the Druid Class. This allows him to have more than one companion, effective Druid level split between those companions. IE Pack Lord Druid Level 6 could have a Wolf 3 and Roc 3.
Boon Companion Feat to boost an Animal Companions level by 4 (but no higher than your characters level).
So, if you were Pack Lord Druid Level 6, you could have Wolf 1 and Roc 5, Take the Boon Companion Feat for the Wolf and half Wolf 5 and Roc 5.
Or, Wolf 2, Roc 2, 3rd animal, 3 Boon Companion Feats and all animals would be at 6.
Pack Lord Druid gets an Improved Empathic Link at 6th level so it might help to have a disposable scout creature, say Wolf 2, Roc 2, Hawk 2. and take 2 Boon companion feats to have Wolf 6, Roc 6, Hawk 2.
Keep in mind that when you gain a level, you only advance 1 companion. If the Druid wants to reset HD, he has to release at least 2 companions and then reacquire them.
| Spee |
Animal companions with an Intelligence of 3 or higher can select any feat they are physically capable of using. They'll get a stat increase at 4th level.
Look into some of the Teamwork Feats, Precise Strike and Outflank have worked well for me.
A team of Wolf 6, Wolf 6 with Weapon Focus (bite), Precise Strike and Outflank can be nice. Getting better at Wolf 7, Wolf 7.