Could you add descriptions of the actual rules of borders and attrition? I'd be a lot more interested in the rules for borders than the rules for attrition. Both of these are complicated things that require more description than is given in the help menu.
Under attrition, it would be nice to know what the losses are based on, which is probably some equation based on the difference of the rolls. This would allow people to know how likely it is to weaken pieces when attacking with lower army values.
For borders, I've noticed several things that seem to be built in behaviors that aren't described. The biggest of these is that borders seems to establish an arbitrary consistent bias towards defending certain tiles. It seems like the sort of thing that may've been intended for the conquer mode, where it may've biased units towards where you are focusing, but it's worse than random in full map. It's quite awkward when these tiles happen to be isolated islands, which is often the case in the full map start games. It seems like, independent of that, there's a bias towards defending against larger threats. For instance, I rarely see pieces added against borders that only have 1's. The only thing borders currently mentions is the player vs surrendered player vs empty tiles and filling middle randomly after that. It implies that borders places troops randomly on the borders, which doesn't seem to be the case.
Could you add all the relevant information to the borders description?