mad dog's pack tactics + outflank

[trist megistus]

Pack Tactics (Ex)

At 2nd level, a mad dog and her war beast gain a +4 bonus on attack rolls while flanking the same opponent (instead of the normal +2 bonus).

Outflank
Benefit: Whenever you and an ally who also has this feat are flanking the same creature, your flanking bonus on attack rolls increases to +4. In addition, whenever you score a critical hit against the flanked creature, it provokes an attack of opportunity from your ally.

...do they stack to +6? neither says increase by +2, so I'm thinking not.

[Mathius]

By raw you only get a +4 but in most home games I think you could get a +6.

[Martiln]

well pack tactics increases it to +4 when flanking with your war beast, whereas outflank increases it to +4 when flanking with someone else who has the teamwork feat, so there's no point in giving your war beast the teamwork feat, but you and your other allies might want to still take outflank, so you can get a +4 when flanking with them.

[trist megistus]

actually, I mostly was interested in outflank for the secondary benefit, the AoO for crits, but if I could squeeze out another +2, all the better.