What combinations would be good for my beys in the tournament?
 Ifritor i2
Xcalius x2
Zeutron z2
Forge disks
2 magnums
Infinity
Performance tips
Impact
Liner
Weight

I was thinking of making Ifritor an attack type or is it better as balance 

I wanted to combine it with genesis and d33 or with the unite driver

Sorry, but all of your parts are outclassed or obsolete.

But you could use X2 on infinity and weight as the best combo you have.

It would be a good idea to get some parts if you aim to go to tournaments, mostly Takara Tomy parts (you used hasbro names, so I’m guessing you have hasbro parts).

Please use the Build me a Combo 2 thread. But leosama's suggestion is absolutely right.