What makes the most sense IMO is to frontload the first few years while he's still incredibly effective, and then get the AVV lower by lengthening the contract to 8yrs. For age context, Kucherov was 30 last year and won the Art Ross, while Panarin was 32 and Stamkos was 34. It's reasonable to expect a player of Draisaitl's caliber to be very effective in the first half of a long-term deal, and to pay him accordingly for it. It's less certain he will do that as he ages, so it's unlikely he can command that king of money now, for his leter years.
The following structure pays him the highest salary in the NHL for the first 4 years:
Year 1 (age 30) - 17.000
Year 2 (age 31) - 16.500
Year 3 (age 32) - 15.000
Year 4 (age 33) - 14.500
Year 5 (age 34) - 12.000
Year 6 (age 35) - 9.600
Year 7 (age 36) - 8.500
Year 8 (age 37) - 8.500
Total: 101.600
AVV: 12.700 AVV
I think it'll end up being something along these lines. It offers a fair balance of him getting paid top dollar (which the NHLPA wants), while also allowing for some cap flexibility for the team to keep the roster as competitive as possible (which the NHL wants). It also nets him the biggest contract since the NHL implemented the 8yr max rule, which is exactly what MacKinnon did when he last signed (and McDavd before him).