Guild mob rank balance and purpose for better high number experience

For rank rewards, I think we could have something like flat rewards added to the rank you reach. Nothing too much big, just like having 20 PP for normal and 50 for boss to first damage dealer and/or more moves added on top of everything else
Then, I think we could add heavy stashes in the mix, making something like this

Top 25% - 2 supreme stashes
Top 50% - 2 heavy stashes
Top 75% - 2 medium stashes
Other - 2 mini stashes

On top of that, the extra PP based on the specific rank, upto 20% of guild player count. So 100 player means top 20 get flat PP extra

The purpose for better combo

I think there is a big big issue for combo and also for the guard/defender loot

There should be a malus for those who broke combo. I know it may happen, but if I see player entering at 10% just to spam move, ruining combos and proccing guard, it just frustrate me the hell out of the earth. So for each combo broken, like 1% less rewards. More you ruin others experience, more the malus rise faster, so let's say like 1-2-4-8-15-20% less rewards. Every correct combo set you back to previous malus