Matching Green Flame Blade to Eldritch Blast (& Other Melee Cantrip Invocations)

[Yakk]

I don't see a need to make Warlock damage curve identical to what it is today, down to the dipping.

Change Agonizing Blast to a class feature with different rules.

Starting at level 2, when you deal damage to a creature with a cantrip, it deals additional damage equal to the number of invocations you know.

This makes low level Warlocks weaker, and high level single-class Warlocks stronger.

Make the Pact of the Blade able to use charisma to attack whenever you make an attack as part of a Cantrip as an extra feature. So double-stat can be handled either via Hexblade, or using Cantrips.

At level 11, maybe add Repeating Blast. "If you make an attack as part of casting a cantrip, you attack one additional time.

5d10+40 for EB (67.5), 8d10+16 for Fire Bolt (60), 8d8+32 for GFB (70) plus 6d8+26 (53) splash assuming +3 weapon.

A level 2 Dip in warlock deals 4d10+8 (30) with EB, 4d10+2 (24) with FB, 4d8+10 (28) with GFB plus 3d8+7 (20.5) splash.

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Warlocks prior to level 9 deal less damage, but have a free invocation.

At level 9 the warlock is dealing the same damage with EB: 2d10+10. GFB deals 2d8+10 and 1d8+9 splash assuming an 18 casting stat and +1 weapon.

At level 11, the warlock damage goes up compared to before. 4d10+20 instead of 3d10+15 with EB (42), and 6d8+20/4d8+18 splash (47 and 36 splash) GFB, and 6d10+10 (43) FB.

          Old                New                     Stats
Level    EB+AB     EB     GFB/SEC     FB       CHA     WEAPON    INVOK
1         5.5      5.5    7.5/3       5.5      16      +0         -
2         8.5      7.5    9.5/5       7.5      16      +1         2
5        19.0     17.0    17/11.5     14       18      +1         3
7        19.0     19.0    18/12.5     15       18      +1         4
9        19.0     20.0    19/13.5     16       18      +1         5
11       28.5     42.0    49/36       43       18      +2         5
13       31.5     46.0    53/40       45       20      +2         6
15       31.5     50.0    57/42       47       20      +3         7
17       42.0     67.5    68/53       60       20      +3         8

So maybe a bit too much power spike at 11. On the other hand, I've seen fighter/archer/great weapon builds...