Well, technically the Ranger and Fighter both use the default Warrior thac0 table which is +1/level up to 0, while the Bard uses the Rogue that's +1/2levels, Cleric uses the Divine caster that's +2/3 levels... default Thac0 table.
And what I was talking is the Bard defaults + the kit bonuses... which is almost the Fighters table, with a small delay, and not proficiency/weapon dependent attack rate.
Well, the goal is to make the new skald a competent warrior (but not as good as a pure fighter). The exact values are still in the air...maybe swashbuckler kit could be used as an inspiration?
Of course the names are... I was just thinking that as a one spell is just a little too few, the HLA's could give multiple effects...
And they can also restrict each others, just like the mages summon Planetar HLA abilities that are "EXCLUDED_BY" the opposite planetar ability, in the luma0.2da, here's a default luba0.2da
So if the A1 is allowed for everyone, the A2 could need the A1 and restrict the B3, while the A3 would require the A2 and restrict the B2...
B1 is allowed for everyone, B2 requires B1 & restricts the A3, B3 requires B2 and restricts the A3 ...
While the C1 is allowed for everyone...
D..
E..
...
Of course, HLAs still need a lot of work. But your idea has merit - the player would have to pick who he'd want to be, figuratively speaking, a poet or a warrior - i.e. you can't take "throat slash" if you take the improved skald song. Which could actually work pretty nicely when you think about it.