1. Use tartaros terminators if you don't want cataphractii, personally I say go for a mix.
2. I find vet.
tac. squads to simply not be worth it. you pay way to many points for a squad that tops out a 10 men with 3+ saves.
3. Basically everything is balanced or has a use, this isn't
40k where you need to avoid X unit, and worry about Y unit not being as good as Z unit, bring what you think looks and plays cool. Use support squads to balance out what your melee dudes are missing. a safe bet is probably support/heavy support squads with flamers/heavy flamers so you can charge after melting things
if you are playing melee, you are probably gonna want larger
tac. squads with extra
CCWs + apothecaries so you can mow things down with weight of attacks as opposed to hoping your 10-man squad in a rhino can manage to still be useful in close combat
DON'T overload on vehicles or non "common" elites until
SW get rules, because you will hate yourself if they pull something like the
IH have, and have a rule like "you cannot field more vehicles then you have infantry squads" and remember, (if you're not sure) 30k space wolves are actually grey, not blue grey