If a member finds that the cockroach troops give great drops, they don't make a great F2P (that's a drop that's not P2P). Many recommend the level-82 Lesser Demons (in RuneScape Gold Karamja Island's volcano). They boast about their medium rune helmets they've received as drops.
I've received an helm with a rune from a Lesser Demon, but I wouldn't choose the level 82 Lesser Demons because they are the most F2P-friendly drops. Undoubtedly, the Barbarian Village Dungeon's level 75 ankous (Stronghold of Security), is the creature that I believe provides the best loot.
Ankous drops law runes. Although there's no rune medium-helm, this is the most important loot. Rune items drop from Lesser Demons (or cockroach soldiers) are seldom, whereas ankous regularly drop good items.
Jagex intends to eventually release all weapons, armor and armor in Dragon. This is not a place to discuss their appearance or specific attacks.This is the complete list of everything still not released in melee. Wow! That was a much shorter list than I had expected.
I believe that the war-hammer is going to be released along with the new Dwarf or Fremmenik quest or zone. The unique attack could be beneficial in PvP situations such a Clan Wars, Bounty or other similar scenarios. I think that plate armor has a less resiliency to strikes that crush, and so the war-hammer could be used as a crushing weapon. This could be a weaker and less destructive variant of Buy OSRS Gold Statius's warhammer that could be used in PvM scenarios as well.