Hello! I really hope they see this topic, because I have this great idea!
Let's say they add a new stat tab saying BONUS, which will give you a HP bonus, or maybe attack/def bonus?
Well this is how it works:
If you have mail, helmet, shield, gun and sword, in star 3, You would get 3 bonus HP (an example).
I have all my items including gun, mail, helmet, sword, shield in star 5 now, and it would be great with this feature :)
To make it a bit more simple, helmet and armor could be the only requirments to get the bonus. Example: Mail star 4 and Helmet star 4 gives a BONUS of maybe 4+ HP?
This is just a suggestion, se let me know what you guys think :)
I think a set bonus is a reasonable thing, but I feel like because of how it would most reasonable work, wouldn't be very useful. For starters, simply counting "3 star gear" as a set would be far too broad to warrant a reward. What would be more reasonable, is "jelly gear" giving a bonus. Logically, this would mean 'jelly gear' 'brute jelly gear' 'rock jelly gear' and 'royal jelly gear', each with their own set bonuses. Meaning a rock jelly plate, rock jelly shield and a royal jelly helm wouldn't give you a set bonus, or at least not as big of one as rock jelly plate, rock jelly shield, and rock jelly helm, as the second grouping matches in both equipment tree, and equipment level.
However, the only logical bonus for a set of jelly style equipment is a bonus to piercing damage. But with a full set of jelly gear, your piercing resistance is already much higher than you'll be able to use, given that your total elemental, shadow, (and normal?) resistance will likely be at zero, so monsters of that type will tear you apart. As it stands, you tend to get better results from from a mismatched gear set, allowing you to cover more damage types.
However, perhaps a compromise would be to allow set bonuses to apply, based on COSTUME gear. This means plate equipment can give me normal resistance, and jelly costume can give me a small boost to piercing.
Also, the wiki's pages on jelly gear seem outdated. I'll try to remember to gather the new info next time i'm on the game, but it stands to reason a large portion of lower level gear might still have old numbers, from when everything defended against everything, on their pages still.