Brave Frontier

My last run I just finished:
Battle 2: 58000
Battle 5: 86600
Battle 6: 83400

Battle 2 didn't have an ATK elixir due to no paralyzes / curses.
Finished the run at 2.2mil.

First time I've actually bothered looking at my overkill so I have no idea how it compares to the standard "Turn 3 Rosetta SBB".

Attack elixir doesn't matter. Overkill is #hits * 200. Attack bonus is based on total damage done. Anyways, your overkill points seem to be low. I usually have 90k - 100k on the 3 enemy stages and over 60k - 70k on the two enemy stages. Considering all the stages you could have another 100-150k most likely.

In addition to getting 10 more hits per enemy with Rosetta's BB you get more control over the enemy HP on turn 2. IE, if you see the enemy will have a decent chunk of hp left, you can activate her SBB while your units are sparking and get more damage in. The earlier you SBB the more damage you get, of course. I like to spark Shera and the Larios seperately for this because their sparks are very smooth and predictable. On the last turn, use as few units as possible to kill then use the rest once the enemies' respective HP bars have been depleted. With Sergio and that Thunder chick, just look at the the unit with the second highest HP unless you got lucky with crits and their HP are about the same as their teammates.

Imma do another run and record my scores.

edit:
1: Weak 50000 Overkill 71600
2: Weak 83400 Overkill 88600 (Elimo used her second heal (Panjit Force) and messed me up :\ )
3: Weak 55600 Overkill 61800 (Was too conservative/scared of a crit on turn 2)
4: Accidentally used Rosetta SBB turn 2. Couldn't spark to get SBBs for turn 3. 2.4m+ run ruined
5: Weak 62400 Overkill 74600 (Scores would be similar to turn 2, but no Shida SBB to start with)
6: Weak 83400 Overkill 93000 (multiple crits on Ardin)
7: Missed scores. Slightly better than average overkill
Total 2.35m. Could have easily been in the 2.4-2.5m range had I not fuqued up on stage 4. I'll try to write my scores again when I do my morning runs.

As a last note, I have a few end of stage point benchmarks to see how well my run is going. These are the cumulative scores at the end of the round for 2.4m+ runs.
1: > 250k (highest I remember is like 265k)
2: > 650k
3: > 920k
4: > 1.15m
5: > 1.6m
6: > 2m
7: > 2.2m (The 2.5m run was around 2.25 or 2.3m)