It is very difficult to say which are the better/best settings. Sometimes this works better, sometimes that works better. In case of sharp movements within 10-15 min, 3,5,3 setting will nail it better, in other cases the 3,8,4 will give surer results.
Consider the chart below with 3 stochastic divergence periods marked as A, B and C.
If you are using 3,5,3 then you would hit stoploss with A, get very nervous with B (stochs making lower trough but not the price) and hit the jackpot with C.
If you are using 8,3, 4 then A is no trade, B is jackpot and maybe C is a missed trade.
If you combine the divergence with the worm, then maybe you get 3 correct trades.
T4j, 15 period stochs will mean that the first line will formed after 75 min.