The only reason Mence is listed in the first place is because of its fat Defog set. Trying to get it to do anything else is quite frankly a bad decision on any team, and if you are being forced to run offensive Mence there are probably bigger problems with your team than 'mons x, y and z. Its DD set is directly outclassed by Dragonite, who has a better ability for its job in Multiscale, higher bulk and access to ExtremeSpeed to beat priority; as a mixed attacker there is literally no reason to use it over either Kyu-B or Hydreigon or even Garchomp who can achieve all the goals that you hope to achieve with Salamence.
Your comparison to Nape has one major flaw: unlike Salamence, Nape is not outclassed. Infernape's mixed attacker and PhysDef sets all carve very unique niches on teams due to its stellar typing, access to powerful offensive and supportive options in STAB Fire Blast, STAB CC, exemplary coverage, Mach Punch, Slack Off and Wisp etc. have allowed it to avoid being completely eclipsed like Mence is.
As for your Kyurem comparison, you have obviously never either used or faced a competent user of Kyurem because its niche comes from its SubRoost set which is actually surprisingly good due to it having what approaches Ferrothorn-level bulk, unique typing, reliable recovery and Pressure to easily PP stall moves like Gyro Ball, Fire Blast etc. out of PP. If you are trying to compare it to Salamence you have bigger issues - because the only way they are remotely similar is in their Dragon typing, and Kyurem's niche is significantly more defined than Mence's is.
Also idk where this idea that rain is the only argument that is being used for Torn being S has come from and it is just proving that there is a surge of people not actually reading the thread lol. Please read before you assume, as rain hasn't even been a major argument for it once so far from the discussion i've seen rofl
Your comparison to Nape has one major flaw: unlike Salamence, Nape is not outclassed. Infernape's mixed attacker and PhysDef sets all carve very unique niches on teams due to its stellar typing, access to powerful offensive and supportive options in STAB Fire Blast, STAB CC, exemplary coverage, Mach Punch, Slack Off and Wisp etc. have allowed it to avoid being completely eclipsed like Mence is.
As for your Kyurem comparison, you have obviously never either used or faced a competent user of Kyurem because its niche comes from its SubRoost set which is actually surprisingly good due to it having what approaches Ferrothorn-level bulk, unique typing, reliable recovery and Pressure to easily PP stall moves like Gyro Ball, Fire Blast etc. out of PP. If you are trying to compare it to Salamence you have bigger issues - because the only way they are remotely similar is in their Dragon typing, and Kyurem's niche is significantly more defined than Mence's is.
Also idk where this idea that rain is the only argument that is being used for Torn being S has come from and it is just proving that there is a surge of people not actually reading the thread lol. Please read before you assume, as rain hasn't even been a major argument for it once so far from the discussion i've seen rofl