No intro for you.
GEAR
1. Change the Hunting Blade series to deal half pierce. WHB would now do what its flavor text implies it does.
2. Change both Divine armor items to give +Fiend Medium, as opposed to a single piece. Self explanatory.
3. Change Arcane Salamander's Slime/Beast bonuses to Undead/Fiend, and change its Elemental defense to Shadow defense. Cut its Fire resist down a bit, but add Curse resist. Replace Volcanic Salamander's Slime bonus with Construct/Gremlin (low). Turn Deadly Virulisk's Slime bonus into a Low and add a Beast bonus. This will allow these lines to live up to their 'specialist' name without outright surpassing other lines.
4. Change the Bombastic Demo lines to Piercing defense and Mad Bomber to Shadow defense. Why do the other weapon families get multiple resists, but Demomen are stuck with Elemental?
5. Change the Azure Guardian lines to resist all four damage types all-around with slight resists to all statuses. Alternatively, give each piece a universal +Damage Low. For other possibilities, see Luguiru's ideas.
6. Give the Plate lines substantially higher health or defense, much more than they already do, including their respective shields. Or, look at what Luguiru thought up.
7. Give the Almirian set higher overall health and amp up its Shadow defense and Curse resist. (IE, make it the Shadow-defense Plate armor.)
8. Amp up the Grey Feather line's Elemental defense, or give it 'team armor' as Luguiru imagines.
9. Decrease the strength of the Brandish lines' statuses and explosions, with the exception of Acheron. For a more uniqueness-friendly approach, look at what Luguiru has.
10. Reduce the Blitz Needle's charge attack to what it was before the Gunner buffs. It's too bloody powerful.
11. Give the Dark Retribution a slightly higher movement penalty while charging. It's ease of use is a little too prevalent, but otherwise, it's fine.
12. Give the Graviton Vortex a slight damage boost (20%), and remove its knockback on the explosion. For control over carnage (which will differentiate it from Electron Vortexes), another Luigiroo link.
13. Fix Shard Bombs' bugs. Nothing to say here that hasn't been beaten to death before.
14. Something something Big Angry Bomb, something something Irontech Destroyer. Raggle fraggle Ancient Plate. Beep boop, Iron Slug.
15. Troikas.
I feel like I'm forgetting some equips, but whatever.
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ENEMIES
1. Give all Beast enemies very slight tracking in Tier 2, and give them their pre-nerf tracking in Tier 3. Maybe give 'em a ranged enemy, at that.
2. When Wolvers decide to run away, don't let them teleport towards players when they're shot at.
3. Give Chromalisks complete invisibility, appearing translucent for a short time only every now and then, until they take damage or attack.
4. Remove Red Rovers' flamethrower attacks (Fire-status Gun Puppies), or give them to the fire variants of the other turrets as well.
5. Give Retrodes and Skellies a very slight tracking ability in T3.
6. Gives normal devilites, not overtimers a slight decrease in tracking ability.
7. Prevent Greavers from chasing players until they actually see them.
8. Prevent Menders from being able to revive other Menders, and remove their ability to spawn more than one healing circle. Buff their shield health.
9. Give Gremlin Knockers slight tracking ability, or allow them to attack much faster.
10. Give Yesmen the ability to heal their Pit Boss and other surrounding friends.
11. Prevent Gremlins from becoming 'idle' until ALL players are down.
12. Give Vanaduke a sweeping attack, only to be used when he's been frozen (provided the changes in the Statuses section below aren't used).
13. Limit how many bombs a Gremlin Demo can drop due to taking hits, or redo how the drop criteria is met. Mist bombs cause them to be walking explosions.
14. Fix Snarby's occasional nonsense where he can't be stunned even when he's right on top of the bell.
15. Stop the Roarmulus Twins from moving north and south until BOTH of them are in Phase 2.
16. I feel like I'm forgetting something here, as well. Oh well.
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I used to have some status stuff here but I asploded it because it was unrealistic and silly. Balance and fun aren't always hand in hand..
GEAR
2- Sure
5- Distributing defense to all types would give so low proetction that it'd be useless. An universal damage is viable on 5*, but OP for T2.
9- Decrease explosion damage or make Acheron better. But leave the statuses as is.
10- YES
11- NO
12- Might balance lack of shock
ENEMIES
1- Sure
2- the teleport shoudl remain somewhat random, altought improved so this doesnt happen often.
4- I like uniqueness, like quicksilver lichens.
10- silwings are fiend healers. If yesmen turn into healers, wings could switch families... beast maybe?
14- Sure, bugs shoudl be fixed
STATUSES
You're turning freeze into stun. Same goes for shock. And again for poison. Why does every status have to cause slowdowns?