So just to be clear, if you wanted to try to kill yourself you could do
4S
4S+2R
4T
4T+2R
3A+2T+2T
And three more triples (other than axel) of your choice as long as they do not repeat. (i.e. 3Z+3S+3R - or - 3F+3T+3Z)
I'm confused about your notation here. In the five lines above, the +2R (you mean 2Lo in IJS codes?) and +2T represent jump combinations, but the + signs in the parenthetical just mean "and" as in the skater could do those three other jumps as solo jumps?
And just for practicality, it would be really hard to put a loop on the landing of a quad because the skater doesn't get the free leg swinging back to control the check out as he stops rotating. Even with triple axels that's a lot of momentum to check with just the upper body.
That's why when we see 2Lo at the end of combinations is usually at the end of an easier triple, or why we see +2T+2Lo more often than +2Lo on its own or +2Lo+2Lo.
And why we have seen attempts at 4T+3T+3Lo but never 4T+3Lo.
Also, if the skater isn't going to repeat the triple axel, there's no need to do it in combination. So why not do the combinations on the repeated quads, a solo triple axel, and then a three-jump combination starting with a non-axel triple?
Senior men get 8 jumping passes which can include two two-jump combinations and one three-jump combination, for a total of 12 actual jumps.
If a skater has two different quads (each performed twice) and six different triples (each performed once if he's used up his repeats on the quads), that makes a total of ten quad and triple jumps he can include. If he's trying to max out his content, and he's capable of it which a two-different-quad jumper probably is, he would probably put triples on the ends of two of his combinations. They can't both be triple toe, though, so the other would either be triple something-triple loop or triple something-half loop-triple sal or triple flip.
EDIT: Or even one Triple and two 2As just to really be weird. Can you do 3 sets of doubles?
Not sure what you mean here either -- what do you mean by "sets of doubles"?
You can repeat as many different double jumps as you want, but as of last year you can only do the same double jump a maximum of two times.
And of course this becomes a problem if skaters pop their quad or triple toes to doubles by mistake and also plan to do two double toes.