A few flaws in your logic
A: Getting a lucario burned if you can HW it off later in order to beat through your opponents luke counter is 100% good play, at the worst you have a +4 burned luke and they're looking to feed sableye or half their team to it in order to "nullify" the threat. Yes it breaks conventional logic but it does so to win the game quickly and efficiently. There's really no faster way to remove an offensive mons best check or soft counter than to simply sacrifice the offensive mon to break the check or soft counter. You want to stay in, they want to stay in because hell, its their counter to x threat and they don't need it for anything else.
B: Shamin muscles through bliss on its own, though yes it does so at the cost of a good chunk of seed flare PP, still, at the worst bliss runs off and you kill/maim another mon, it has like 3 reliable counters in the tier. Things like hydra and ape require prediction (though yes these mons are amazing). Min requires click flare. Click coverage for quad resist. Furthermore ape has absurdly low sustain and is laughable weak unboosted while also beign frail as all hell. Hydra has bulk, sustain in roost...and is setup fodder to some very nasty mons the second it clicks draco. Both Nape and hydra are also prone to giving up free turns despite their raw power. Hydra has 4mss with LO, nape gives chandy and victini all the free turns ever, both are also revenged by anything that revenges shamin.
C: 100/100/100 bulk on a grass type in a tier where bulky grounds waters and some electrics are common even on offensive teams gives min an abundance of swapin opportunities. Yes its easily RKed though admittedly that's applicable to every single non scarfed attacker in the tier not named tornadus-T or alakazam, however anything not a dedicated hard counter or special wall gets shredded swapping in and special walls are often forced out by that 37% DIE chance.
D: Saying an offensive support set requires support is um, wut? I'm arguing shamin for A+/borderline S based on its functionality as a stand alone offensive hose that can assist other mons in "forcing" a sweep overload HO style while still maintaining a varied offensive presence and even freeing up spots for defensive pivots on HO. HWMin requires you at the most to run the huge sacrifice of fire and flying resists, last I checked things like rotom-H and MAmpheros see use on heavy offense thanks to their ability to soak those types and maintain momentum. Hell min even comes in on their weaknesses and proceeds to click abuse button.
TL:DR: Running an effective 2 copies of your strongest sweeper along with an under prepared for sustainable wallbreaker that offers excellent synergy with the best offensive threats in the tier on any offensive team is pretty close to, though probably not quite S tier if you can fit it all into 1 mon slot. If your doubtful give it a try.