Lapras Question

Lapras is not capable of taking out a Blissey. I wouldn't power it up just for attacking Snorlax but another Dragonite counter sounds good. You may want to keep it for prestiging gyms tho. I think that's your best bet

If you already have a lvl30 Lapras, you can keep the 2nd one as he is and save your precious dust.

Don't you have any Eggys for Blissey? They're pretty amazing with Solar Beam.

If you have a Rhydon with Rock Smash, he's also pretty useful against Blissey and Snorlax.

So many Pokémon will do great vs Blissey such as Dragonite w/ DT or DB, Flareon w/ FS/OH, Machamp wC/CC or DP, and Sb Eggy all do wonders vs Blissey. I'm not sure if Lapras can take down Blissey but Vape will do the job just fine vs Lax. But Lapras is still amazing and worth powering up....

Keep it at a nice low level. I love mine for prestiging.

I also have one with FB/B at lvl 31,5 and a second one with the same moves for prestiging. If there are more than two Dragonites though I have a DB/DP Gyarados at lvl 31,5 too.