I disagree.
I have linker 1, ele 1 in my build, and currently soloing fine at level 175 with my c1 ele skills.
He will be doing much more damage than me because c2 linker. This is because the damage in the elec+linker combo is incredible the more links there are. Every mob gets hit 3 times, but that is now shared across the link on each mob that is hit. So 3 * 8 (elect rank 5 hits 8) , every mob will be hit 24 times. I only have C1 and it’s enough to kill mostly every group on mob.
The cast time isn’t bad because hangman bind is long enough to hold them all.
Prom with attribute allows you to kill any monster, and especially great in aoe it has surprisingly high DPS, and easy to control with the attribute because the flames always come out of the ground where your feet are.
Plus hail is just a great AoE for dungeons and bosses.
He doesn’t even need high int to pull this off. 100 con off the bat would be great.
I do agree that getting ele so late in the build is kind of weird, because job ranks level slower, so your dps won’t be improved for a long while. Especially don’t need quickcast when going linker linker right after. One of the highest damage Wiz combos is Hangman + Magic Missle. Even at full con you’ll one shot dungeon creeps, especially because Quick cast. So maybe:
Wiz > Wiz > Linker > Wiz > Ele > Linker > Warlock.
((You only need auto attacks for first 3 ranks. Buy buffs from town. Linking will increase leveling speed a lot more than Wiz 3))
This also will also allow you time to rethink that Linker c2 based on your playstyle if you need it still or not.