I see yet another FGO player has joined the AK ranks.
A lot of advice was already given but let me add one more, or rather let me expound a bit more on something others have mentioned already.
Similar to FGO but also better in a way, the low rarities in AK are pretty good in their own way. This is because many operators fall into specific ‘Archetypes’ such as “Anti-air Sniper” or “Ranged Guard”, and so Operators in the same archetype can more or less substitute for one another with little difference in performance during the early game.
Unlike in FGO where a level 50 5* Servant has better stats than a level 50 1* Servant , a level 50 3* Operator has more or less the same stats as a level 50 6* Operator, assuming, of course, that they are of the same Promotion level.
So if you’re lacking in resources and such, a low rarity would give you better immediate returns (much cheaper to raise and promote to E1 than higher rarity) so you can progress further and get to the better farming stages so you can then work on the more expensive high rarities, who are often more of long-term investments.
A few of the stand-outs I can see in your roster are:
Melantha, who has exceptionally high ATK stat for a 3*, surpassing even high rarity Guards.
Cuora, easily one of the tankiest of tanks in the entire game
Vigna is another operator with high ATK and has an offensive-oriented skill and Talent that makes her a great pick for a starting Vanguard. Although she only gives you DP if she kills an enemy, DP-on-kill Vanguards like her will refund the FULL DP cost of deploying them, so you don’t really lose any DP by deploying her or anyone with her Archetype.
Lancet-2 may not have high stats and is limited to low levels, but the fact that Robots don’t use up a Deplpyment Slot means you can drop an extra healer even when all the deployment slots are used. She also heals ALL your ops by a small amount (higher if her Potential is raised) when you deploy her, so it’s a good emergency healing option if you need it.
I notice you dont have her, or maybe you just haven’t leveled her, but be sure to buy Gavial from the Credit store (she alternates with Courier after you buy him). Her second skill works as a semi-AoE heal, which is great to use in a pinch.
Perfumer, as an AoE medic, doesnt heal as much per attack when compared to to ST medics, but it’s good for healing multiple ops at once. And her Talent gives global passive healing, so even operators outside her range get a small but continuous heal as long as Perfumer’s on the field. The amount is small but sometimes it can make all the difference.
Shirayuki, and AoE Sniper in general, don’t often see much use due to their slow Attack Speed, but they are useful on stages with lots of tightly packed enemies. In addition, Shirayuki’s second skill allows her to switch to dealing ARTS damage, letting her bypass the enemy’s DEF stat completely, making it great for tearing apart high DEF enemies. Though in turn it will be affected by the enemy’s RES stat but mostly it’s enemy Casters who have high RES but then they have low DEF in turn, so her regular attack will be more effective on them when her second skill is inactive.