You don't have to unstake to enter into 3,3 together pool. I deposited 2.2 ohm into 3,3 together pool and it cost about $15 gas fee. The only thing that changes when you deposit into 3,3, Together is that you have a chance to win a third of the Award and interest earned on your deposit goes to the 3,3 Together pool rather than to your account until the award period expires. Then the interest automatically starts accumulating back into your account. If you withdraw your deposit before the award period expires then you get hit with a 3% early exit fee.