Pros:
- Effective Multi-lane xp soaking.
- Great at soloing mercenaries.
- Summons are great cannon fodder.
- Can manipulate his army of skeletons and soak xp even when dead.
- Able to scout the whole battlefield without being detected.
- More mana that any other hero.
- If properly talented, has great self healing.
- If talented, can attack towers while out of range.
Cons:
- No mana regen, must use Soul Drain.
- Lacks a mount.
- Skeletons are weak against AoE damage.
- Very hard to micro-manange.
- Extremely low mobility.
- No escape until level 20.
- Lacks any CC abilities.
- Vulnerable to CC abilities.
- Channeled abilities can be interrupted.
- Skeletons cost a lot of time and mana to summon.
- Weak in team fights.
PS: Is the mount supposed to be [W]?