Roughly:
Levels:
1 feat: combat expertise+improved trip
2 teamwork feat: Tandem Trip
3 feat + bonus feat: Weapon Proficiency+weapon focus
4 +1 dex?
5th feat (Precise Strike?): ?feat
6th
7th feat+Bonus feat: Outflank + Weapon Focus
Eidelon Ymir:
Levels:
2: Evolution?
3: Feat? Evolution?
4:
5: Con 14? Evolution?
6: Feat? Evolution?
7: Evolution?