1. Make several waves before earning a tick, with 3 of the same kind of boss in the last wave, not just one (or have one extra boss per entire cycle you win if you somehow beat all the waves of all the levels and it repeats, or even start doing waves of bosses at that point).
2. Increase hitpoints of the bots and armor (not powerstrike as they already tend to do good damage)
3. Max limit of players 25, but increase bots number by 10-15 per wave
4. Make DTV servers melee only as that would reduce much of the reason for camping and increase the difficulty, especially with how skilled bots are at chambering your attack. Would force more coordianted group tactics like pike walls, rather than hiding unreachable places and shooting sniper xbows with 2 stacks of large bags of normal bolts per xbowman ( a concern right now if an admin not always on, with this we could ahve it keep running without an admin being there).
Overall, think the new game mode is awesome and would look forward to some extra levels being added as well.
P.S. something full invasion does is have some giant figures that are twice as tall as normal with large weapons (so increased strike range) at the higher levels, also goat riders would be an awesome addition and would make DTV incredibly popular (though maybe a donkey be created instead with 1 riding skill requirement that could be a also a new item for the general game).