So I am done mining for now cause the transaction fees are too high. Here is my custom script that I wrote which will call the transactions more precisely at the rewardEnd date.
Replace XXXX with your values that you want. Anyways I hope this takes off! To run the script, call waitForRewardEndPrecise()

var rewardEnd = contract.RewardEnd.call();

function mine() {
    web3.eth.sendTransaction({to:'0x03df4c372a29376d2c8df33a1b5f001cd8d68b0e', from: 'XXXX', data: getData, gas: XXXX, gasPrice: web3.toWei(XXXX,'gwei')});
    console.log("sending transaction");
}

function mineXTimes(x) {
    for (var i = 0; i < x; i++) {
        mine();
    }
}

function waitForRewardEndPrecise() {
    rewardEnd = contract.RewardEnd.call();
    while(rewardEnd >= Date.now()/1000) {
      admin.sleep(0.0001);
      waitForRewardEndPrecise()
    }
    mineContinuously(30)
}

function mineContinuously(count) {
    console.log('mineContinuously called');
    mineXTimes(count)
    console.log('Waiting sometime ' + Date() + contract.RewardEnd.call())
    admin.sleep(550);
    console.log('Start waiting precisely! ' + Date())
    waitForRewardEndPrecise()
}