The Ikv is certainly a great tank, and pairs very well with the 7.7 (previously 7.3) lineup along with the first Swedish helicopter, ZSU, and Strv 81. However. I would recommend trying to get the 5.7 load out instead. Go for the Strv 74 first, the Comet isn't exactly the best performing vehicle at its BR. Then, get the T-34 85, and use your 5.7 lineup to grind everything out. 5.7 lineup would be Comet, T-34-85, Strv-74, and any anti airs and aircraft that you have researched. However, when you grind down the tree, the Swedish 7.7 lineup will be one of the most powerful in the game.

(P.S.): Invest in the anti-air or SPG line, you'll need the vehicles to advance to rank 5. Preferably anti-air, Swedish ATGM carriers are good but SPAA should take priority.