How to own the Reaper
...on Expert Mode.
Start with 2 Heal and one Frenzy.Next goes to Frenzy,next to Heal,rest till Frenzy is full. Put all ur money no matter what in the speed updates until u have maxed them.
This way you can kill the starting enemys without major problems.Then save the money for the biggest Upgrade.Unlock the second layer. Put your effort into Leech Blade as it will be your new Heal, because normal heal is way to slow.
Its up to you what skills you take then. For the Time Bomb i recommend you to attack like 36 Times, do the Laser stuff,then repeat ancient curse as u get 0 dmg. Surpass the Golem through sheer luck as he is so f** fast ! Well the rest is easy until The Shadow Reaper on the last Stage.
I had the Shield, put it up, then attack as much as i can, resetting the Shield when it is near down.I would attack to loead FP and maybe a Laser in between, and Finally when the Time was right i did the Chaos move with 21 Fp or smth Ripped half of his HP away and voila :)