@XxSeveNxX Since this thread got derailed by someone who seems less informed than some of us:
Necro is an excellent class. It has 2 viable nukes between CDL and Spike. Spike has the same Matt modifier that all summoner's nukes have I believe. CDL is obviously a scaling damage option. Mig runs about about 40% HP and CDLs just fine in LoA; he's geared though
Necro isn't as versatile as some nukers. SPS/Sorc get AoE sleep and nukes, etc. However, with its Gloom debuff, Reliable Pet Stun and Transfer Pain, it is a VERY solid class
At the higher end of play, Necros do shine in AoE, as their Corpse Burst is the hardest hitting AoE nuke in the game. Although you can't spam it, it adds strong AoE potential
Please do consider closely that leveling and EXPing a Necro is SIGNIFICANTLY more costly than running ANY other class if you rely on Death Spike. @miguelsan might be able to give you an accurate % increase in cost
I hope the above is helpful! Glad you're playing L2 with us! Come say hi if you're planning on playing Talking Island Server
*Edit:*
If you're looking for a less expensive option, Phantom Summoner and Elemental Summoner are both VERY strong Single target nukers in their own right. They hit just as hard as the Necro and other casters, and both have Transfer Pain.
Either has strengths, although most folks tend to lean towards Ponies, as, although they have less base INT, they have the Pony Nuker Buffs at 79+ (These buffs are an ABSOLUTE MUST for any caster)