Building a battle party for Lugia

I like the idea of putting a second Golem in. I usually prefer to use a Fast tm on good but not great mon like those you listed.

Not a fan of your dragonite choices, though you are likely sqimming in the candy like the rest of us. I recommend Jolteon. I dont have either Raikou or Zapdos but the Js have been treating me well.

Ive also been trying out Double dark Shiftry, double dark Sharpedo, amd Houndoom but Jolteons have been all aces along with Tyranitar and Golems.

Walrein is ice type which is SE against Flying. But not so effective that I'd recommend it. Not sure about Entei. Its probably just that awesome that it works without needing to be SE. I often see Kyogre and Groudon recommended in complete disregard to typing.

I would go with the 15 atk golem. With lugia return it is likely that the rest of the birds will follow soon, golem is a top counter to all of them.

Can't you get boosted geodudes? Since your golems are not stellar, I'll rather evolve high level dudes. Or if you can't then power up 15 iv first, if by SB you mean RB. For me golems are also good CTM consumers, it only needs one to get RB or SE.

Don't you have any Jolteons to fill up the team? Better than either Golem or Dragonite.
Dragonite is a decent investment, so I would probably try for OR on the HB Dragonite and bump it to level 30.

But what you really should be doing is stop worrying about IVs so much and try to catch weatherboosted Geodudes and Eevees to evolve into useable attackers without a stardust cost. Much more resource efficient.

If pokebattler is recommending Entei and Walrein, it's because they're better than other things you currently have. Sims rarely lie.