...if you really wanted to go +6(5) I doubt many judges would stop you....
By Tier 3 I am finding options really start to open up in terms of what characters can do. If there was a core (or cores...) of "mechanics" you had in your mind for your character (mobility/flight/dim door, multi-target attacking, single target damage spikes, battlefield control....) by early tier III your PC is going to be there.
I hadn't realized guarded charge was a base maneuver. I will keep an eye on that. Tukufu's preferred "move and attack" option is Passing Attack plus Whirlwind.