I think you might be a bit light at the back, one you've deployed you're waiting for drop-pods to arrive, and you've only got three small squads to take the enemies fire for at least the first turn. If they go shooty and get the first turn you might struggle.
Having said that your tactics ain't bad, I like the idea of using Guide with the Rune Priest to help your fangs. I personally run quite a different list, but that's all to taste isn't it

.
This is a 1250 list I play - I usually beef it up with A 4
TWC unit (2 Stormshield,
PW,
PF) for a round 250, and usually another squad of longfangs (115) and a vindicator (115) to take it to 1750. Terminators in a
LR are another option you can take for around 500pts. Rune Priests in Rhinos, 2
WG in Rhinos last one leading the small holding squad. Don't ask about the Dread...I just like them too much not to take one :p.
For yourself
TWC would probably be a good bet, expensive but you don't have any dedicated assault units as of yet.
HQ 1) Rune Priest, Wolftail Talisman – 105pts
HQ 2) Rune Priest – 100pts
Troops 1) 8 Greyhunters, Melta, Power Wpn, Wolf Standard,
MotW – 165pts.
Transport Rhino – 35pts.
Troops 2) 8 Greyhunters (kitted as above) – 165pts.
Transport Rhino – 35pts.
Troops 3) 5 Greyhunters, Melta – 80pts.
Transport Razorback, Lasplas– 75pts.
Elites 1) 3 Wolfguard, Combi Melta * 3, Power Wpn * 3 = 100pts.
Elites 2) Dreadnought – 105pts.
Elites 3) 5 Wolf Scouts, 5 Sniper Rifles – 90pts.
Heavy Support 1) 5 Longfangs , 4 Missile Launchers – 115pts.
Fast Attack 1) Landspeeder, Multi Melta, Multi Melta – 80pts.