Wow and congrats, after all that time you spent it’s about to pay
off. This is where Assassins really start to get good. We nearly
double are attack at level 80 and we finally get a multi enemy attack.
We even save money on potions and we have a skill that increases the
mesos you pick up. We also get a new skill to make us even go faster.
You can max shadow mesos or shadow web, I find shadow web to be kind
of pointless, but if you want it you will have 10 more points, I would
recommend finishing drain or booster, or just put some points into
shadow mesos, or you can put points into endure which I find to be
less important but it is your character not mine. Also if you feel
content with single attacks you can max avenger later on, or at least
get 5 points into it the get flash jump then continue with avenger
then continue on with the build. You can also get mesos up before
alchemist

Level 70- 1 copycat
Level 71- 3 copy cat
Level 72- 3 copycat
Level 73- 3 copycat
Level 74- 3 copycat
Level 75- 3 copycat
Level 76- 3 copycat
Level 77- 3 copycat
Level 78- 3 copycat
Level 79- 3 copycat
Level 80- 2 copycat 1 avenger
Level 81- 3 avenger
Level 82- 3 avenger
Level 83- 3 avenger
Level 84- 3 avenger
Level 85- 3 avenger
Level 86- 3 avenger
Level 87- 3 avenger
Level 88- 3 avenger
Level 89- 3 avenger
Level 90- 2 avenger 1 flash jump
Level 91- 3 flash jump
Level 92- 3 flash jump
Level 93- 3 flash jump
Level 94- 3 flash jump
Level 95- 3 flash jump
Level 96- 3 flash jump
Level 97- 1 flash jump 2 alchemist
Level 98- 3 alchemist
Level 99- 3 alchemist
Level 100- 3 alchemist
Level 101- 3 alchemist
Level 102- 3 alchemist
Level 103- 3 alchemist
Level 104- 3 mesos up
Level 105- 3 mesos up
Level 106- 3 mesos up
Level 107- 3 mesos up
Level 108- 3 mesos up
Level 109- 3 mesos up
Level 110- 2 mesos up 1 shadow mesos
Level 111- 3 shadow mesos
Level 112- 3 shadow mesos
Level 113- 3 shadow mesos
Level 114- 3 shadow mesos
Level 115- 3 shadow mesos
Level 116- 3 shadow mesos
Level 117- 3 shadow mesos
Level 118- 3 shadow mesos
Level 119- 3 shadow mesos
Level 120- 2 shadow mesos 1 into Booster, Drain, or shadow web