The simple answer is it doesn't.
The SS kept raising divisions right to the end. With a few exceptions most of those were from mediocre to abysmal. Everything from Volksdeutsche (Germans living outside Germany) to Bosnians to the Kaminski Brigade. The later types were only capable of fighting unarmed civilians and the occasional partisan, real scum of the earth.
The premier SS divisions (1-3,5 and later 9-12) would have started as 468, graduating to 548 sometime in '42 and 658 by mid '43. Some others like 16 & 17, formed '43 would be best represented by mainly 548.
I take the different types to represent both armament and combat skill. While the premier divisions got upgraded at the squad level other units remained equipped at early war standard level for the most part. Some of the upgrading would have been unofficial, battlefield pick-ups and temporary merging of battalions/companies/platoons due to personnel losses and the resultant concentration of LMG, SMG, etc but there were also official reorganisations. Eg, 1st LSSAH started as a motorised infantry regiment, then a motorised division after Yugoslavia and in '42 was withdrawn to become a Panzergrenadier division, though in practice that ended up being a conversion to an over strength Panzer Division with 2 rather than 1 Panzer Abteilung (battalion). The original allocation of LMG was 1 per squad and went to 2 in '42.
All German divisions were supposed to be beefed up at the squad level, usually a 2nd LMG from '43 onwards and more SMG, semi-automatic rifles and finally StG 44 from mid-late '44 (most noticeably in the Volksgrenadier conversions). while the premier SS often got their upgrades earlier and more completely, the trash were later than many Heer units and simply did not have the skill to take full advantage.
436 or BFP's new 437 from PiF.
A chunk of the higher numbered trash all war and 6th Nord in '41. Not entirely, but a reasonable chunk of a scenario OoB.
447
A good part of 4th and 6th until late '43 or early '44. Early 7th & 8th. The majority type for the higher trash.
468
All premier until '42. Some in 2nd line (4th, 6th before '43, ditto 7th & 8th). The becoming the majority of 4th, 6th-8th in '43. The better elements of the higher numbered trash as they often started building with decent cadres.
548
Premier '42 until early '43. Increasing numbers in the 2nd line from mid '43, some in the trash. 16th & 17th the majority.
658
Premier from Kursk onwards. Good numbers in 2nd line and especially 16th and 17th from mid '44.. Small number in the rest.
I mentioned 6th Nord. It's early performance in '41 was quite abysmal, so majority 447 with a fair chunk of 436/437 and some 468. From '42 onwards it started to gain its feet so gradually going to majority 468 with some 548. After covering the German retreat from Lapland it got refitted in Denmark and was committed to Nordwind and by that stage would have been a mix of 548, 658 with some 468 and 447.
The 2nd echelon which would include 4th, 7th, 8th & 22nd would have started out with a mix of 447 and 468, improved with more 486 then some 548 and finally 658 would have had 468/447 until the end. While not the best, mid career onwards they would have been as good as the average Heer infantry division.
The trash would have been mainly 447, with sprinklings of 468/548/658 and decent numbers of 436/437.
There were a fair few rather mixed units like 18th Horst Wessel and 38th Nibelungen, even 33rd Charlemagne that were organised from prior units or the staff and students of training schools that had good to very good cadres, but were never built up to strength in men and equipment or had insufficient combat experience as a division, so would be represented by a mix of all types with a moderate preference for the better ones.
The SS was definitely a parallel national army on it's own, with everything from excellent to abysmal included and as expected later units quality suffered, often greatly. ASL's design for effect can cater for this, best look at a unit's performance in a battle to decide, but as a general rule 468 should only disappear from the premier divisions starting in mid-late '42 but survive in other SS units till war's end. Of course 468/447 could represent rear area troops in even the premier divisions if being overrun by a breakthrough at any time.