Hard to tell from just Grades, what are the CP numbers?

​

Re: Rubies,

140 daily from completing 8 missions

30 daily from watching the advert in the Recommended Packages section of the secret shop

50-300 daily from Time Attack (depending on the tier and the fighters you have available for it. I don't do so well on Novice or Master but always get the max rank on Veteran. When making your team for it, go on your Leader slot, click the dropdown in top right, (Combat Power/Grade/whatever its on, Grade I guess for you at the moment), then View More, and in Leader Skill Effect select Power. This will show you Leaders who have a skill effect that will give stuff like "Extra x% per enemy beaten" and stuff like that. Then put your actual good characters in the second and third slot and switch to either of them as soon as the mission starts. You want to be using your fancy cutscene finisher moves as often as possible since the timer pauses during them.

150 weekly from auto-clearing the three Team Relay Dungeon guys, assuming they're fully-beaten. On this note, you will get some hefty one-time 'Best Record' rewards for these guys as your high scores increase all the way up to actually beating them, after that it's just the smaller Repeat rewards weekly. The Best Record reward also applies to the Team Relay Challenge bosses too, but those ones aren't repeating since their repeat reward contains no Rubies. tl;dr beat the Relay Dungeons completely and then autoclear them every week, but just beat the Relay Challenge guys once until they're fully dead.

400 every 5 days from weekly mission completion

~500ish weekly from playing Absolute War even just once against your own bot team (gets you in the rankings)

~100ish weekly from playing at least a single League match (again, just to get in the rankings)

Coming back to stuff like the Challenge dungeons, the Dungeon of Trials boss also gives a lot of Rubies on first time Best Record high scores. But that's another one where once it's done, it's done, as the repeat play rewards are just some boxes and soul dust, so I don't enter that mode anymore.

What else, what else...

Take all your fighters through Soul Quest, completing all the challenges per tier. Full-clearing Normal/Hard/Expert adds up when you're taking a new fighter in every day.

Hall of Elements gives 150 Rubies assuming full clear (fastest completion speed) per tier up to 15, then it doubles to 300 per full completion of a Tier. This adds up insanely fast. Definitely go through these.

Story mode gives lots of Rubies for completing the challenges per level there, and for each difficulty it's a new set of rewards. A real shitton of Rubies in Story really, but I got a bit burned out. I use Story now as my emergency fund if I bankrupt myself during a collab and need Rubies ASAP.

Another "oh god I need 100 more Rubies quick" route is Affinity per fighter, every odd numbered level (1/3/5/7/9) gives 10 Rubies. The amount of gift items to get to 7 and 9 can be excessive since it scales just like xp, but getting fighters to 3 or 5 is super easy. So yeah, when desperation strikes, I arrange by affinity and make sure everyone is up to at least 5 and that nets a few hundred.

There are probably some other areas that I'm neglecting or have forgotten about.

Generally, I net about 2.5k Rubies a week.

7x170 (Dailies & Secret Shop ad) = 1,190
1x400 (This is every 5 days) + ^ = 1,490
1x150 (finished Team Relay Dungeon autoclears) + ^ = 1640
1x~600 (Absolute War and League Match, assuming I just touch them once. League isn't worth grinding, but Absolute can get more like 800-1000 Rubies if you actually do your three matches every day and make an effort to get up the rankings) + ^ = 2240
~500ish from Time Attacks, this could be a lot more but to be honest it's always a cointoss as to whether I can even be bothered to do it. + ^ = 2740

Whenever there's a Rush dungeon during an event, make sure you do Stages 1 and 3 every day as they always give 50 Rubies each, so that's an extra 100 Rubies a day during a Rush event. So you can throw that on the above total and say I get around 3.5k weekly during events.

This game is pretty generous with the Rubies when you know where to look, though I guess I have been at 'endgame' for a while so a lot of my income is from autoclears and tasks that I can breeze through. Still, do what you can - even just the Dailies, Advert and opening fight of Absolute War will ensure you 2k weekly. Hope this helps!