Look at the code below it is the params and count explained.

    [[skillx]]
        setting = "es_xset wcs_count <how many wards>;es_xset wcs_params <duration of wards>_<damage>_<ward radius>"
        cmd = "es wcsgroup set ability event_var(userid) warden;es wcsgroup set ability_count event_var(userid) server_var(wcs_count);es wcsgroup set ability_parameter event_var(userid) server_var(wcs_params);es wcsgroup set ability_cooldown event_var(userid) 3"
        sfx = ""

Explained:
*wcs_params (x) means the position of the parameter by "_"s.

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wcs_count - How many wards does the player have at this skill level?
wcs_params (0)* - Duration of the wards at this skill level.
wcs_params (1)* - Damage of the wards at this skill level.
wcs_params (2)* - Radius of the wards at this skill level.

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~MiB