Q about blessings --> niefelheim pretender strat

[Aezeal]

I was comparing nature earth and water bless (for determining a pretender start for niefelheim I'll admit)
my questions:
1. Reinvigoration means you lose that amount of fatigue per turn?
2. Quickness means higher move AND + 1 attack every other round right?
(the spell even says + one attack and +3 att and def)
3. what exactly does berserk +2 do?

add 2.
I was looking while in battle and I see the extra attack nowhere nor the +3 att/def (apart from the water bless) so I guess maybe you don't get an additional attack.