No, you cannot use a Revenant Assassin as a high-damage striker.
Original Assassins have fantastic mobility, interesting secondary effects, and absolutely worthless damage (a thought explored in both practice and theory). Roughly speaking, you'll want your striker's DPR to fall within (8*Level+24)/4 and (8*Level+24)/2.
To calculate DPR, use the following formula:
- Base defense = 14 for AC, or 12 for NADs (Fort, Ref, Will)
- Level is level of the character
- ToHit is the total attack modifers of the character
- Critchance is .05 (20), .1 (19-20) or .15 (18-20)
- CritDamage is the maximized Weapon Die * Number of Dice
- WeaponDamageAverage is Number of Dice * die average * n[W]
- Die Average = sides/2+.5
- Brutal 1 = sides/2+1
- Brutal 2 = Sides/2+1.5
- Static Modifier is the unchanging modifier added to attack rolls
- ExtraDamage is the weapon's critical extra dice: This can include bonus dice from the weapon's enchantment and/or bonus dice from the high crit property.
For a level 1 defender with longsword: To-hit is 4+3, damage 1d8+4:
(1-(14+1-7-1)/20-.05)*(4.5+4)+(.05)*(8+4) = 5.70
(Defenders and other low-damage types fall within
(8*1+24)/**4**=8 4-8 damage.
For a level 1 barbarian with howling strike and a 1d12 executioner's axe: To-hit is 5+2, from stat+proficiency; a brutal 2 weapon drops the average by one, and adds 2; and rampage adds an extra basic attack on crit.
(1-(14+1-7-1)/20-.05)*( (5.5+2)+5+3.5 )+(.05)*(12+5+6+6.5+3.5)+(.05)*(1-(14+1-7-1)/20-.05)*( (5.5+2)+5)+(.05)*(12+5+6.5+3.5) = 12.97 on howling strike. So a level 1 barbarian is a "3 round striker" (HP estimate / DPR) which is quite accurate.
For assassins, they suffer from a number of problems: unspectacular dailies, a very swingy striker damage feature that doesn't scale with tier, and unimpressive at-wills, as per the guide. If you want a respectable damage assassin go with the Executioner assassin released in Dragon 394. However, individual builds may vary, and should be assessed using the above guidelines.