Fix Hold the Ground description

The physical save and cooldown values were swapped. See http://forums.te4.org/viewtopic.php?f=42&t=50773 .

I also removed a redundant '+' in the same description. I noticed that descriptions in general are inconsistent in whether they say "increase X by Y" vs "increase X by +Y". The latter seems redundant to me, so I removed it in this case. If you agree I could also do that for the other descriptions.

See merge request !625

Misc168

Reduce scaling of all action and global speed talents at post-player talent levels   

Nerf rampage  

Replace blighted summoning on gorbat with grand arrival and rage   

Add cost to some fixedarts without one   

Reduce damage taken requirements for cauterize and corrupted shell 

See merge request !619

The physical save and cooldown values were swapped. I also removed
a redundant '+'.

This reverts commit bb71869f

This reverts commit e7f1e8e4

There's precedent for not giving negative stats on egos and this isn't really adding much to the ego

There's precedent for not giving negative stats from egos, which this breaks for no good reason 

There's precedent for egos not having potential for making items worse (with exception of antimagic/arcane conflicting powers) which this violates for no good reason 

This is hitting for 1k life iceblocks in tier 1s; especially considering it's based on damage before resistances and reductions, 1.5 multiplier is very high

This reverts commit 110f50f2

This is out of line with the power of other on hits and trivialzes the value of slow for melee classes, reaching upwards of 50% slow near constantly applied with ease

Fix Vargh Redemption AI

When playing as an alchemist and wielding Vargh Redemption, the ring's Tidal Wave talent would automatically trigger if you switched to your golem. This happened to me in Angolwen and hit one of the mages. Fun ensued.

Compared to the normal Tidal Wave talent, Vargh Redemption's copy didn't have the `requires_target` field set, which resulted in the tactical AI deciding it was fine to fire it. I added the field, defining the target and radius similarly to Tidal Wave.

More details in the bug's forum thread: http://forums.te4.org/viewtopic.php?f=42&t=50680

See merge request !618

Having such a low minimum level isn't accomplishing anything besides killing new players and annoying experienced ones who have to avoid areas it can spawn

Which they already were in all but name

The tactical AI was using the ring's tidal wave ability even if there were no
enemies around, which doesn't make sense and could harm / aggress friendlies.
I added requires_target and based the target value on that of the Tidal Wave
spell.

These were never reduced to reflect prodigies being at 25 instead of 30 and aren't really in the player's control anyway

Rak'shor already has blighted summoning and it's not very thematic on gorbat

This is consistently problematic on enemies and players got predator with 1.6, so the class no longer needs as uber powerful of a talent anymore