Pal nemesis LV 1 vs LV 10 which better?

As title, anybody can share your idea on which level is most efficiency or valuable for pal nemesis?

Everyone is complaining nemesis in beast form is terrible, it is better keep it in pal form, so please share your opinion. 

Thanks.

2 bombs against 5?

I have it level 9. yes, sometimes its transformation prevents the movement of troops, but you also adapt to this