So I have this 93% Walrein and this 89% Lapras...
Walrein has Blizzard but a water fast move, Lapras has Ice Beam (legacy) and a water fast move. Should I start investing dust and FTMs (currently I have 4) in them so I'll have more Ice attackers? Currently my only reliable Ice attacker is a 91% Cloyster with FB/Avalanche.
Answers
Yes, those are both good, tanky ice attackers (and defenders). Fast TM's are fairly easy to come by once you start being able to handle T3 solos (and hopefully find a group to do T4 & T5's with). With only four, though, you might consider just TM'ing one of them for now. I would go with the Lapras, unless the Walrein is already much higher level, in which case it would be immediately usable.
I'd look for more rainy or snowy Spheals to get a Walrein, but if you have a lot of FTMs, that's a good choice. I wouldn't put much (any) dust into Walrein, just find a level 35 Spheal in the wild.
Ice beam Lapras, on the other hand, is both a legacy moveset, and awesome. My favorite Ice attacker (I don't have an Articuno, and Lapras is only singly weak to rock while Articuno is doubly weak to rock), IB Lapras is useful both for raids and gyms. I'd fast TM that sucker to Frost Breath and power it up in a heartbeat. I powered up mine, and it put a lot of hurt on Rayquaza.
All that said, Rayquaza flies away tomorrow, and Ice becomes far less useful. Your Cloyster is probably fine for gym attacking unless you regularly see Dragonite/Salamance together a lot, in which case you'd need another ice attacker.
Okay, what can I use as counter out of the following things I have:
Dragonite DT/Hu, Jolteon VS/D, Houndoom S/C, Banette SC/SB, Shiftry FA/FP, Kabutops MS/AP, Cloyster FB/A? Because I have nothing else that I can power up or afford to change the moveset of, I have no good Tyranitar, no legendaries, not enough CTMs to throw away.
It's hard to say when you have nothing, idk how much dust do you have, but likely you need a lot to power up other useful mons.
For lugia out of easily obtainable mons golem, jolteon, wild charge arcanine, houndoom, rarer mons: gyarados, snorlax, gardevoir, ampharos, not that common must haves: dragonite, tyranitar, salamence all of them performs better with proper moveset. Main advantage of lapras is bulk.
I'd need to be really lucky to get a good Tyranitar, can't find raiders.
I only have 1 dragon type that's got good IVs and I'm considering giving him a dragon charged move whenever i find another CTM, but hope I don't get Hyper Beam.
Dust is not a problem for me, I'm sitting on around 15k worth of dust daily.