From a guess, just short of a Venator class (1300 metres long) If I was to compare the Oddy to the Queen Elizabeth class Superdreadnoughts, then the Typhoon would be like the Renown class Battlecruiser. Crew taking automation into account, I'd say 800-1,000 officers and enlisted including Marine detachments. My bad,…
Something more along the lines of the old NPC Typhoon gimmick, it would tractor you in and fling your ship with force like a bowling ball inflicting heavy damage.
I just went all Phaser on mine with the Discovery torp, fighters are Elite Terran and Federation Valkyries. I sacrificed science more better tactical and she's more like a pretty quick Battlestar.
Also, stay mobile and only stop briefly to deploy any deployables then keep moving. I tend to use shoot and scoot as a method for rapidly changing location fast. If you have the Voth Mech suit, that is also useful as is the Red Angel armour. I usually save the mech suit for the last few rounds against the more difficult…
A Dominion Vanguard MW Flight Deck Cruiser would be excellent, the Jem Hadar are very light on available ships. Maybe have the MW Flight Deck as one of the Dominion Battlecruisers from DS9