Unless I'm missing something the HSA looks like a no brainer either way. The deductible is $1,000 higher, but you get $900 deposited by your employer AND save the $1863 in premiums. Since both plans OOP max is $3500, just go with the cheaper option.
Minimum cost of HSA plan: -$780 ($900 from employer minus $10/mo prescription)
Maximum cost of HSA plan: $2,600 ($3500 OOP max less $900 from employer)
Minimum cost of plan 2: $1,983 (premium + $10 prescr.)
Maximum cost of plan 2: $5,363 (premium + OOP max)
I'm trying to figure out if there is a theoretical sweet spot between the $1983 minimum cost of plan 2 and the $2600 maximum cost of the HSA where you could possibly be slightly better off with plan 2, but i think that's a pretty narrow window that's not worth trying to thread.
Not to mention you can deposit $2500 into the HSA for some tax savings.