Just a couple questions about which eido I should use

1) Sakura (max, +34) s. Takemikazuchi (no limit break). Sakura's stats are way better, but take gives an extra 5 burst, 1 turn sooner. Worth the trade-off?

Amaltheia vs Tiamat vs Kaiser. Tiamat and Amal's abilies are similar, though Timat has way better stats. Should I spend 3k to get/max Tiamat and replace Amal, or Keep amal and save for Kaiser?