I’ve raised Astolfo for the exact same reason Drake is useful.
The 50% battery makes her a very potent farmer for both normal content and events.
During events lacking CEs that provides any np gauge it is a nice QoL to be able to eliminate a wave simply by adding a support Waver.
For Nerofest she is a prime candidate to use the damage boosting CE.
Outside of farming Drake is a pretty good star generator and her np gain is very high so she can both crit and fire her NP often. Her batteries Ignore Invincibility is also a nice touch for stage gimmicks or skills.
If you are dissatisfied with her NP damage you could always equip a Heaven’s feel or if that isn’t an option the welfare CE we will get soon from the Halloween rerun.
x, Drake, Waver, Shakespeare.
Simply use the Chaldea Combat Uniform and replace Waver with a Shakespeare and Drake’s NP will hit for more than 51k neutral damage even if it hasn’t been MLB.
Even that damage can be buffed easily once the Journey West has its rerun or if you get a Heaven’s Feel, Black Grail, Waver or Merlin. Theoretically up to 90-110k.
Using only welfare CE and fp summons Drake’s NP can reach 60-74k neutral damage.
It is far harder to increase Ishtar’s damage. Her lack of battery adds CE restrictions plus the available quick support options only last for a turn and they can’t provide sufficient NP gauge. The better quick supports are unfortunately all 4-5* while Buster has budget Shakespeare and in the future Chen Gong.
If I follow the same non-gacha restrictions then I believe Holy Night supper and Alexander are the best options and that would result in 52-64k of neutral damage.
If we on the other hand includes Gacha or anniversary tickets then:
Waver, Holy Night supper and Atalanta nets 57-70k, which is below Drake’s non-gacha damage.
Skadi’s arrival next year does open a few doors.
Ishtar (Heaven’s feel), Waver, Skadi reaches 83k+.
This teambuilding is based on the assumption that only 2 supports are available even with the Combat Uniform.
In this example I also assumed all skills are at rank 10. NP1 for Drake, NP5 for Ishtar.
Heaven’s feel isn’t MLB and all CE’s attack is 500.
The point I’m trying to make is that Drake has a far higher damage potential without relying on the fickle gacha and even then you’d need to own either a Skadi or Waver plus at least a Heaven’s feel.
Edit: Fixed the linebreak