TallIan
Explorer
Snip
But back to the blade for a moment. If you give them medium armor, and both weapon invocations for free, that just brings them up to par.
That is why I like the idea if the "invocation tax" for getting them up to par. If they are brought up to par with a free bump then their options (the now free invocations) lift them above par.
eg giving them med armour and thirsting blade as their invocation choices makes them viable in combat and the warlock spells and patron abilities make them equal but different.
Equally a warlock that takes the eldritch blast invocations would be a good ranged character with the warlock spells and patron abilities make them equal but different to a ranger*.
If you give the warlock med armour and thirsting blade for free they now have the ability to take the eldritch blast invocations making them better at fighting than a ranger* and better at shooting than the fighter and still has the warlock spells and patron abilities.
*assuming a range build ranger
The only real problem I see with the blade 'lock is that you are forced to go DEX build because you have no access to armour without using optional rules (MCing and feats)