The effective way of rotation should be all 4 ways rather than 2 ways.

Hence, front crosses to rear and read straight up to front, eventually all wheels would have moved around to all four sides.

But take note that not many shops follows this, unless the customers requests

if you keep crossing both ways, you wont be rotating to all for sides, and that is 2 way

say now, you have the rear rotated to the front (straight) (take RR (rear right)...what happens on your next round of tire balance/rotation, you will be crossing the front, then it would go to the RL from FR.

Eventually all four will get rotated to different sides in 4 rotations

Too small.  Get 195/55/15 instead. Ps3 is an excellent choice but got much cheaper option which is just as good,  Hankook V12E2.

Using 185/55/15 now can change to 195/55/15 if needed, using PS3

Now the change is due soon... budget a bit tight need to d/grade any suggestions? Prefer less than 200 per tyre..

Thinking EP300, not sure if i will regret tho

V12E2 rm165/PC around Klang Valley.
PS3 I think around 200-220/PC.