In most if not all smoke grenades used in the time period, the obscuring agent is phosphorus, usually white.
Smoke grenades are… Not particularly too useful.
They lack the power to actually obscure an area. Smoke artillery and smoke shells loaded by tanks can obscure an area instantly whereas smoke grenades require time for the smoke to fill an area, and can even be thrown back during this period to render it useless.
WP grenades are a shadow of their former self.
Their duration, damage and area of effect has been significantly decreased to the point that they can usually be ignored unless you were set on fire by the initial blast. They no longer phase through walls, fizzle out in water, can no longer cover an objective and most notably, require a soldier to stay inside its area of effect for almost 6 seconds in an otherwise 8 second-only effect. If they have the vitality perk, they have to stay inside the cloud for the entire duration of the effect.
To put it bluntly, neither of these throwable weapons have a particularly strong niche.
- Frag and impact grenades are the premiere anti-infantry throwable.
- Molotovs can deny an entryway/chokepoint for an entire half-minute.
- Explosive packs are versatile, having limited AoE and range in exchange for the ability to destroy vehicles.
And then there’s smoke and WP, which are flawed for the reasons aforementioned. They are not viable enough to equip into slots.
My suggestion is to combine the two grenades into one in the following way:
- Smoke grenades instantly propagate their smoke on detonation, as with WP grenades.
- The opacity of the grenade smoke is increased to the same level as artillery/tank smoke shells
- Damage dealt by the cloud is reduced to 1/s from 1.75/s.
- Smoke grenades last 15 seconds.
- Opacity and damage notably drops at the 10 second mark.
The intention is to make the smoke a temporary hazard that can be charged through at risk of damage, but not enough to allow someone to stay there indefinitely. They’ll both obscure and discourage people from entering the smoke, unless they’re willing to place a risk charging through it. It would also combine the two otherwise useless grenades to create a viable and unique tactical tool.