DON'T SPAM (insert hard mod here) is harder than Rena, IT'S NOT SUPPOSED TO BE THE HARDEST MOD, NO, NO.

Trollge Week 2 had Absurde, which is (probably) harder than the Rena mod (I don't know a single thing about Rena and the mod that was made about them, but I'm just gonna say that Absurde is harder than the whole mod for a lot of reasons)

1. Rena hasn't even been released yet.
2. I literally just said not to do that.
3. I know it's not FNF footage, but "Uh La La La Maniac" is what the charting is like.

1. When will it be released? Do you know?
2. I know, I'm just stating something.
3. I honestly have no idea what your talking about.

1. 9/26 (hopefully, schedule is conflicting tho)
2. OK, just wanted to make sure
3. The most infamous song in DDR, due to poor charting.
4. I'm gonna add a secret where if you hover over Rena's week (1), then Yuni's (4), and then type REDZONE, you unlock a song called REDZONE, where you fight all opponents in the mod, including some from other mods.

Sounds like a lot of work. How many weeks in total will there be in the mod?

6. Each one has a different opponent, excluding the 6th. Week 1 has Rena, Week 2 has Emi, Week 3 has Rage, Week 4 has Yuni, Week 5 has Naoki and N.M.R., Week 6, you fight Emi again, only now in DDR GB's art style.

Are you looking for ways for the mod to be really hard or did you decide on what your gonna do/use?

Every song has their own points.
Week 1:
Geisha and Revolution. Geisha is the infamous DDR 2010 chart, with 16th note crossovers and double steps. Revolution's EXPERT chart is a new chart, referencing other mods.
Week 2:
The entire week. Ska is horribly offbeat, but the ending is the hardest part. Horatio has health draining arrows. Uh has notespam.
Week 3: Entire week again. They all have their hardest points. 4/5 songs in the week have stops.
Week 4: Only 1 song, but it's kinda difficult, referencing hard songs from DDR. Also, you have to play on downscroll, 1x scroll speed, sudden death.
Week 5: Only 1 song again, and you have to play with downscroll, 1.5x, and sudden death.

At least you acknowledged a few of my suggestions. My brother was gonna suggest adding 10 keys but I don't know how well that story would've ended.

Well... there's also a mode where you play BOTH sides of the equation, called "doubles"

It's like an unintentional 2 player feature.

There's also "couple" and "versus" mode. The difference is that in "Versus", you're synced, but P2's chart is rotated 90 degrees. In "couple", you play the same chart.

May I make some suggestions?

Sure.

1. Game modifier in settings. "Split."
2. No.
3. ENTIRE MODE, only for a few songs though. It's called "Solo".
4. Nope.
5. Keybinds customized by player completely.
6. Not doing that.
7. Modifier called "Drunk"
8. You can change how much HP drains for missing a note/hitting a hurt arrow.
9. Nope.
10. That's already the entire song. Also, Shock Arrows (the mod's hurt arrows), when you hit them, cause the notes for the next part to go invisible.

1. F**k with the arrows, like how in the song "Hell sights" the arrows get separated then switched with one another.
2. Constant health drain. Either like Tabi with constant HP drain or like Disruption Bambi with HP drain every time he hits a note. Doesn't have to kill them when their HP hits 0 (ex: Vs slenderman) or has to be a lot (ex: Taki) but just enough to make it really hard for the player.
3. Extra keys. It's self explanatory.
4. Instant death notes (ex: expurgation death notes)
5. The most devious one (probably). Switch keybinds in the middle of a hard song.
6. Another really devious one. Make the screen rotate like in Absurde.
7. Screen shaking. It can mess with the players flow and distract them.
8. Chunks of HP lost at certain points in the song, like in the expansion update of the Bob and Bosip mod. I forgot which song it was introduced in, but I don't really care.
9. Quadruple notes as seen in the Sad Mouse: Craziness Injection mod in the third song. Maybe go even further like in Thearchy.
10. Hide death notes in a barrage of normal notes. They won't see it coming.

That's it for now. I could give more suggestions if I had any more ideas, but I'm all out for now.

Week 6: Not really difficult at all.