[PF1e optimisation] 5th level eidolon evolutions

[Trandir]

My (chained) synthesist summoner finally got to 5th level and by taking extra evolution again I'd get 9 evolution points in total.

So far I'd go with:

2× improved natural armor. 2× 1pt
1× ability increase (str). 2pt
1× skilled (perception). 1pt

Any advice on how to spend the rest?

Sidenote: I'll avoid fly for my DM's sake for another couple of levels and the base form is biped