level 10 meteor with no quickcast from wiz 3 = lol worthy. Good luck standing there for 10 seconds casting a attack. that can be canceled any time of the day.
I got myself a wiz3/ele3/wl1 and i barely every shoot level 8 meteor out which is only 4 seconds with the 50% cast time delay.
Meteor is nothing more then a filler skill you will often use it to burst down a few monsters but not load it fully.
Elemental in general without wiz3 is going to have long long cast times.
I wouldn’t get anywhere over level 4 meteor without wz3 to be honest and spend those points into something else.
About your combo, yes elec + hail + rain works realy well, i use it all the time.
But to be honest elec is more of a filler skill then anything else, it dmg output is really unstable as it depends on how much it bounces or if it bounces at all. If it bounces well, the dmg is really good. but if it doesn’t the dmg is terrible.
I wouldn’t focus on that skill to be your main dmg output solution. you are better of going wiz3/ele3/wl1 then. Wiz3 and ele3 sync way more better.